New Solid State Sodium Batteries Enable Lower

Browse technical resources about industrial energy storage, solar PV, microgrids, and emergency backup systems.

HOME / New Solid State Sodium Batteries Enable Lower - EXIT-LYON Energy

Related Topics:

Solid State Sodium Batteries
  • Advantages and disadvantages of sodium ion energy storage batteries

    Advantages and disadvantages of sodium ion energy storage batteries

    Explore 5 key advantages and disadvantages of sodium-ion battery including its benefits like lower cost, material availability and drawbacks like low energy density.


    FAQs about Advantages and disadvantages of sodium ion energy storage batteries

    What are the advantages and disadvantages of sodium ion batteries?

    Chart Title: Advantages of Sodium-Ion Batteries What are the disadvantages of sodium-ion batteries that affect their adoption? Disadvantages include: Lower Energy Density: Sodium-ion typically has an energy density around 140-160 Wh/kg, compared to 180-250 Wh/kg for lithium.

    Are sodium ion batteries suitable for different applications?

    Consider these factors when assessing the suitability of sodium-ion batteries for different applications. Lower Energy Density: Sodium-ion batteries generally have lower energy density, meaning they can store less energy in the same volume compared to lithium-ion batteries.

    Are sodium-ion batteries the future of energy storage?

    In the evolving field of energy storage, lithium-ion batteries have long been considered the gold standard, particularly in applications such as solar power storage and electric vehicles. However, a new contender is emerging in the form of sodium-ion batteries, presenting a range of potential advantages that warrant closer examination.

    What is a sodium ion battery?

    Abundance of Sodium: Sodium-ion batteries utilize sodium, which is naturally abundant and widely available, reducing dependence on scarce resources. Lower Cost: Sodium-ion batteries are cost-effective compared to lithium-ion batteries, making them a more affordable option for energy storage.

    Do sodium-ion batteries have a lower energy density?

    Sodium-ion batteries have a lower energy density but offer the advantage of using more abundant and lower-cost materials. Ongoing research and development efforts aim to improve the energy density of sodium-ion batteries. Explore the differences and potential advancements in sodium-ion battery technology.

    Why are sodium ion batteries important?

    Sodium is more abundant in the Earth's crust, reducing the environmental impact associated with mining and extraction processes, and promoting a more sustainable approach to energy storage. How Do Sodium-Ion Batteries Operate? Discover the working principles of sodium-ion batteries.

  • What are the advantages of sodium energy storage batteries

    What are the advantages of sodium energy storage batteries

    Advantages Over Lithium-Ion Batteries: Sodium-ion batteries offer several benefits, including cost-effectiveness due to the abundance of sodium, improved safety with a lower risk of overheating, and a more environmentally friendly production process.


    FAQs about What are the advantages of sodium energy storage batteries

    What are the advantages of sodium ion batteries?

    Advantages Over Lithium-Ion Batteries: Sodium-ion batteries offer several benefits, including cost-effectiveness due to the abundance of sodium, improved safety with a lower risk of overheating, and a more environmentally friendly production process. They are a sustainable alternative, particularly for large-scale energy storage solutions.

    Are sodium-ion batteries a cost-effective energy storage solution?

    Sodium-ion batteries are rapidly emerging as a promising solution for cost-effective energy storage. What Are Sodium-Ion Batteries? Sodium-ion batteries (SIBs) represent a significant shift in energy storage technology. Unlike Lithium-ion batteries, which rely on scarce lithium, SIBs use abundant sodium for the cathode material.

    Do sodium-ion batteries have a lower energy density?

    Sodium-ion batteries have a lower energy density but offer the advantage of using more abundant and lower-cost materials. Ongoing research and development efforts aim to improve the energy density of sodium-ion batteries. Explore the differences and potential advancements in sodium-ion battery technology.

    Why do we need sodium batteries?

    The data and telecommunications sectors have infrastructures and processes that rely heavily on energy storage. Sodium batteries can provide power on demand to ensure a stable and secure energy supply. Reducing carbon emissions from transport is a key pillar of the energy transition.

    Are sodium ion batteries suitable for different applications?

    Consider these factors when assessing the suitability of sodium-ion batteries for different applications. Lower Energy Density: Sodium-ion batteries generally have lower energy density, meaning they can store less energy in the same volume compared to lithium-ion batteries.

    What is a sodium ion battery?

    Abundance of Sodium: Sodium-ion batteries utilize sodium, which is naturally abundant and widely available, reducing dependence on scarce resources. Lower Cost: Sodium-ion batteries are cost-effective compared to lithium-ion batteries, making them a more affordable option for energy storage.

  • Can sodium ion batteries use graphite from solar telecom integrated cabinets

    Can sodium ion batteries use graphite from solar telecom integrated cabinets

    Co-intercalation reactions make graphite as promising anodes for sodium ion batteries, however, the high redox potentials significantly lower the energy density.


  • What are the types of batteries for industrial energy storage

    What are the types of batteries for industrial energy storage

    What is the most common type of industrial battery? The most common types of industrial batteries are lead-acid and lithium-ion batteries, with lead-acid being widely used in backup power and forklifts, and lithium-ion gaining popularity in electric vehicles and renewable energy storage.


    FAQs about What are the types of batteries for industrial energy storage

    What types of batteries are used in energy storage systems?

    The most common type of battery used in energy storage systems is lithium-ion batteries. In fact, lithium-ion batteries make up 90% of the global grid battery storage market. A Lithium-ion battery is the type of battery that you are most likely to be familiar with. Lithium-ion batteries are used in cell phones and laptops.

    What types of batteries are used in power systems?

    Battery technologies overview for energy storage applications in power systems is given. Lead-acid, lithium-ion, nickel-cadmium, nickel-metal hydride, sodium-sulfur and vanadium-redox flow batteries are overviewed.

    What are the different types of storage batteries?

    A variety of electrode materials are featured in such type of storage batteries. Some of them are : Nickel (hydroxide)–cadmium systems - These are the most common small rechargeable battery type for portable appliances. They are heavy and have comparatively limited energy density.

    What are battery energy storage systems?

    Battery Energy Storage Systems play an important role in integrating and accelerating renewable energy deployment. There are four applications in which batteries are deployed to increase the share of variable renewable energy and improve electricity supply reliability.

    Which battery technologies are used for energy storage applications in power systems?

    Abstract – Battery technologies overview for energy storage applications in power systems is given. Lead-acid, lithium-ion, nickel-cadmium, nickel-metal hydride, sodium-sulfur and vanadium-redox ow batt eries are overviewed.

    Which storage batteries are best?

    The lead-acid storage batteries are most economical for larger power applications, where weight is of minor concern. These type of storage batteries are preferred choice for wheelchairs, hospital equipment, emergency lighting and UPS systems, factories and telephone exchanges, to power emergency lights.

  • Future space for energy storage batteries

    Future space for energy storage batteries

    Innovations such as solid-state batteries, climate-friendly materials and sustainable charging infrastructure are ushering in a new era of energy storage that will be even more powerful, safer and more resource-efficient than ever before.


    FAQs about Future space for energy storage batteries

    Are batteries the future of energy storage?

    Developments in batteries and other energy storage technology have accelerated to a seemingly head-spinning pace recently — even for the scientists, investors, and business leaders at the forefront of the industry. After all, just two decades ago, batteries were widely believed to be destined for use only in small objects like laptops and watches.

    Why are lithium-ion batteries used in space exploration?

    Lithium-ion batteries play a crucial role in providing power for spacecraft and habitats during these extended missions . The energy density of lithium-ion batteries used in space exploration can exceed 200 Wh/kg, facilitating efficient energy storage for the demanding requirements of deep-space missions . 5.4. Grid energy storage

    How is battery technology transforming the energy landscape?

    Breakthroughs in battery technology are transforming the global energy landscape, fueling the transition to clean energy and reshaping industries from transportation to utilities. With demand for energy storage soaring, what's next for batteries—and how can businesses, policymakers, and investors keep pace?

    Why is battery storage important?

    Battery storage can help with frequency stability and control for short-term needs, and they can help with energy management or reserves for long-term needs. Storage can be employed in addition to primary generation since it allows for the production of energy during off-peak hours, which can then be stored as reserve power.

    Are lithium-ion batteries the future of energy storage?

    While lithium-ion batteries have dominated the energy storage landscape, there is a growing interest in exploring alternative battery technologies that offer improved performance, safety, and sustainability .

    How can battery storage help balancing supply changes?

    The ever-increasing demand for electricity can be met while balancing supply changes with the use of robust energy storage devices. Battery storage can help with frequency stability and control for short-term needs, and they can help with energy management or reserves for long-term needs.

  • The level that energy storage batteries need to reach

    The level that energy storage batteries need to reach

    To facilitate the rapid deployment of new solar PV and wind power that is necessary to triple renewables, global energy storage capacity must increase sixfold to 1 500 GW by 2030.


    FAQs about The level that energy storage batteries need to reach

    What is a battery energy storage system?

    Reduction of energy demand during peak times; battery energy-storage systems can be used to provide energy during peak demand periods. The ratio of power input or output under specific conditions to the mass or volume of a device, categorized as gravimetric power density (watts per kilogram) and volumetric power density (watts per litre).

    How can battery storage help balancing supply changes?

    The ever-increasing demand for electricity can be met while balancing supply changes with the use of robust energy storage devices. Battery storage can help with frequency stability and control for short-term needs, and they can help with energy management or reserves for long-term needs.

    Why is battery storage important?

    Battery storage can help with frequency stability and control for short-term needs, and they can help with energy management or reserves for long-term needs. Storage can be employed in addition to primary generation since it allows for the production of energy during off-peak hours, which can then be stored as reserve power.

    How much lithium-ion battery storage does the world need?

    Meng projects that a future version of the world that relies on clean energy will require between 200 TWh and 300 TWh of lithium-ion battery storage. That is an intimidating figure, she acknowledged, given that so far, the world's battery industry has achieved only 1 TWh annual production of lithium-ion battery capacity.

    Are battery energy-storage technologies necessary for grid-scale energy storage?

    The rise in renewable energy utilization is increasing demand for battery energy-storage technologies (BESTs). BESTs based on lithium-ion batteries are being developed and deployed. However, this technology alone does not meet all the requirements for grid-scale energy storage.

    Why do we need a battery energy-storage technology (best)?

    BESTs are increasingly deployed, so critical challenges with respect to safety, cost, lifetime, end-of-life management and temperature adaptability need to be addressed. The rise in renewable energy utilization is increasing demand for battery energy-storage technologies (BESTs).

  • Making cylindrical lithium batteries

    Making cylindrical lithium batteries

    In conclusion, the production process of lithium-ion cylindrical batteries involves several steps, including raw material preparation, electrode preparation, assembly, formation, testing, packaging, and recycling.


    FAQs about Making cylindrical lithium batteries

    How are cylindrical lithium-ion cells produced?

    The production of cylindrical lithium-ion cells involves several meticulously controlled steps to ensure quality and performance. The primary stages include electrode preparation, cell assembly, electrolyte filling, formation, and testing. 1. Electrode Preparation

    What is a cylindrical lithium ion battery?

    Cylindrical lithium-ion battery cells are a type of rechargeable battery commonly used in a wide range of electronic devices, electric vehicles, and energy storage systems. They are characterized by their cylindrical shape, standardized sizes, and high energy density, making them versatile and suitable for various applications.

    How do you identify a cylindrical lithium-ion battery?

    For instance, “65” represents a height of 65mm. Fifth Digit: The fifth digit indicates the cylindrical shape of the cell. Typically, it's “0” for cylindrical cells. By following this naming convention, we can easily identify the size and shape of cylindrical lithium-ion battery cells.

    What is a cylindrical lithium-ion cell?

    Cylindrical lithium-ion cells are integral to powering a vast array of devices, from smartphones to electric vehicles. Understanding the assembly process of these cells not only demystifies the technology but also highlights the precision and innovation involved in their creation.

    How many Li-ion cylindrical battery cells are there?

    This paper investigates 19 Li-ion cylindrical battery cells from four cell manufacturers in four formats (18650, 20700, 21700, and 4680). We aim to systematically capture the design features, such as tab design and quality parameters, such as manufacturing tolerances and generically describe cylindrical cells.

    How to design cylindrical Li-ion battery cells?

    A generic overview of designing cylindrical Li-ion battery cells. Function 1: Two types of jelly roll designs can be distinguished: With tabs and tabless. Jelly rolls with tabs can be realized with a single tab (Design A) or several tabs in a multi-tab design (Design B).

  • Are residential communication base station batteries safe

    Are residential communication base station batteries safe

    Among various battery technologies, Lithium Iron Phosphate (LiFePO4) batteries stand out as the ideal choice for telecom base station backup power due to their high safety, long lifespan, and excellent thermal stability.


    FAQs about Are residential communication base station batteries safe

    Which battery is best for telecom base station backup power?

    Among various battery technologies, Lithium Iron Phosphate (LiFePO4) batteries stand out as the ideal choice for telecom base station backup power due to their high safety, long lifespan, and excellent thermal stability.

    What makes a telecom battery pack compatible with a base station?

    Compatibility and Installation Voltage Compatibility: 48V is the standard voltage for telecom base stations, so the battery pack's output voltage must align with base station equipment requirements. Modular Design: A modular structure simplifies installation, maintenance, and scalability.

    How do you protect a telecom base station?

    Backup power systems in telecom base stations often operate for extended periods, making thermal management critical. Key suggestions include: Cooling System: Install fans or heat sinks inside the battery pack to ensure efficient heat dissipation.

    Why do data centers use Telecom batteries?

    In data centers, telecom batteries provide backup power to servers and networking equipment. They ensure data integrity and availability during power outages. Cellular networks rely on telecom batteries to maintain service continuity.

    Why are Telecom batteries important?

    Telecom batteries are crucial in emergency power systems, providing immediate backup when the main power supply fails. This is vital for maintaining communication during disasters or emergencies. 3. Key Features of Telecom Batteries The capacity of telecom batteries is measured in amp-hours (Ah), indicating how much energy they can store.

    What is a telecom battery?

    Telecom batteries play a crucial role in powering equipment, supporting backup systems, and facilitating smooth operations. This comprehensive guide will delve into the types of telecom batteries, their applications, maintenance tips, and the latest advancements in battery technology. 1. Understanding Telecom Batteries 2.

  • What can replace energy storage batteries

    What can replace energy storage batteries

    From iron-air batteries to molten salt storage, a new wave of energy storage innovation is unlocking long-duration, low-cost resilience for tomorrow's grid.


    FAQs about What can replace energy storage batteries

    What are alternatives to lithium batteries?

    Alternatives to lithium batteries include magnesium batteries, seawater batteries, nickel-metal hydride (NiMH), lead-acid batteries, sodium-ion cells, and solid-state batteries. These options offer varying benefits in cost, safety, and environmental impact, presenting potential solutions for diverse energy storage needs.

    Are magnesium batteries a good alternative to lithium ion batteries?

    Magnesium batteries are emerging as a promising alternative to traditional lithium-ion batteries. Magnesium, being a divalent cation, can move twice the charge per ion, potentially doubling the energy density. This means that magnesium batteries could store more energy in the same amount of space.

    Can lithium-ion batteries be recycled?

    Yes, lithium-ion batteries contain valuable metals like cobalt and nickel that can be extracted during recycling. However, they need to be properly handled so very little effort goes into recycling them. Lithium-ion batteries power everything from smartphones to electric vehicles today, but safer and better alternatives are on the horizon.

    Could hemp batteries be a green alternative?

    The use of hemp, a fast-growing and sustainable crop, makes this technology environmentally friendly and potentially cost-effective. As research progresses, hemp batteries could become a green alternative in the energy storage sector.

    Are batteries repurposed?

    Additionally, recycling efforts are ramping up, with companies like Li-Cycle and Redwood Materials aiming to recover up to 95% of critical materials from spent batteries. Researchers are also exploring abundant alternatives, such as sodium-ion batteries, with CATL announcing mass production plans.

    Can a lithium ion battery replace cobalt?

    A lithium-ion battery uses cobalt at the anode, which has proven difficult to source. Lithium-sulfur (Li-S) batteries could remedy this problem by using sulfur as the cathodic material instead. In addition to replacing cobalt, Li-S batteries offer a few advantages, namely higher energy density and lower production costs.

  • Liquid-cooled energy storage cabinet with batteries

    Liquid-cooled energy storage cabinet with batteries

    Liquid-cooled energy storage container Core highlights: The liquid-cooled battery container is integrated with battery clusters, converging power distribution cabinets, liquid-cooled units, automatic fire-fighting systems, lighting systems, pressure relief and exhaust systems, etc.


    FAQs about Liquid-cooled energy storage cabinet with batteries

    What is 125kW liquid-cooled solar energy storage system with 261kwh Battery Cabinet?

    We would be happy to answer your questions. Subject : 125kW Liquid-Cooled Solar Energy Storage System with 261kWh Battery Cabinet Its advanced control modes provide flexible energy management, enabling seamless integration with wind power, photovoltaic systems, and other energy storage components.

    What is included in a battery cabinet?

    Each battery cabinet includes an IP56 battery rack system, battery management system (BMS), fire suppression system (FSS), HVAC thermal management system and auxiliary distribution system. Outdoor liquid cooled and air cooled cabinets can be paired together utilizing a high voltage/current battery combiner box.

    What is a Megatron 1500V Battery Cabinet?

    MEGATRON 1500V 344kWh liquid-cooled and 340kWh air cooled energy storage battery cabinets are an integrated high energy density, long lasting, battery energy storage system.

    Can a liquid cooled and air cooled cabinet be paired together?

    Outdoor liquid cooled and air cooled cabinets can be paired together utilizing a high voltage/current battery combiner box. Outdoor cabinets are manufactured to be a install ready and cost effective part of the total on-grid, hybrid, off-grid commercial/industrial or utility scale battery energy storage system. BESS string setup examples are:

    What are the technical specifications of hypercube liquid-cooling outdoor cabinet?

    Technical Specifications Solutions Our Cases HyperCube Liquid-cooling Outdoor Cabinet Intrinsically Safe Smart and Efficient Flexible Deployment Easy Maintenance IP67-rated battery pack, pack-level fire protection, multi-layer fuse protection, multi-dimensional electrical detection

    What is a 373kwh outdoor cabinet?

    Each outdoor cabinet is IP56 constructed in a environmentally controlled liquid cooled cabinet including fire suppression. Multiple 373kWh cabinets can be installed together creating up to 4472kWh energy storage blocks. Designed for 373kWh's to 100MWh+ systems.

  • The difference between several types of flow batteries

    The difference between several types of flow batteries

    The main difference between flow batteries and other rechargeable battery types is that the aqueous electrolyte solution usually found in other batteries is not stored in the cells around the positive electrode and negative electrode. Instead, the active materials are stored in exterior tanks and. There are some important differences to account for when comparing flow batteries to the leading battery technologies like lithium-ion batteries: With more and more utility companies switching over to time-of-use billing structures, flow batteries provide a compelling solution for microgrid operators or large manufacturing facilities to shift expensive peak loads over to long-duration battery use.

    [PDF Version]

    FAQs about The difference between several types of flow batteries

    How does a flow battery differ from a conventional battery?

    In contrast with conventional batteries, flow batteries store energy in the electrolyte solutions. Therefore, the power and energy ratings are independent, the storage capacity being determined by the quantity of electrolyte used and the power rating determined by the active area of the cell stack.

    What is the difference between a flow battery and a rechargeable battery?

    The main difference between flow batteries and other rechargeable battery types is that the aqueous electrolyte solution usually found in other batteries is not stored in the cells around the positive electrode and negative electrode. Instead, the active materials are stored in exterior tanks and pumped toward a flow cell membrane and power stack.

    How do flow batteries differ from other rechargeable solar batteries?

    Flow batteries differ from other types of rechargeable solar batteries in that their energy-storing components—the electrolytes—are housed externally in tanks, not within the cells themselves. The size of these tanks dictates the battery's capacity to generate electricity: larger tanks mean more energy storage.

    What are the characteristics of a flow battery?

    A typical flow battery has been shown in Fig. 8. Some of the main characteristics of flow batteries are high power, long duration, and power rating and the energy rating are decoupled; electrolytes can be replaced easily . Fig. 8. Illustration of flow battery system [133,137]. 2013, Renewable and Sustainable Energy Reviews Zhibin Zhou, ...

    What are the components of a flow battery?

    Flow batteries typically include three major components: the cell stack (CS), electrolyte storage (ES) and auxiliary parts. A flow battery's cell stack (CS) consists of electrodes and a membrane. It is where electrochemical reactions occur between two electrolytes, converting chemical energy into electrical energy.

    What is the difference between flow batteries and lithium ion batteries?

    Compared to lithium-ion batteries, flow batteries offer superior scalability due to their ability to easily increase energy capacity by adding more electrolytes to the tanks. Lithium-ion batteries, on the other hand, have limited scalability, as their capacity is primarily determined by the number of cells in the battery pack.

  • A set of lithium iron phosphate energy storage batteries

    A set of lithium iron phosphate energy storage batteries

    Renowned for their remarkable safety features, extended lifespan, and environmental benefits, LiFePO4 batteries are transforming sectors like electric vehicles (EVs), solar power storage, and backup energy systems.


    FAQs about A set of lithium iron phosphate energy storage batteries

    What is a lithium iron phosphate battery energy storage system?

    The lithium iron phosphate battery energy storage system consists of a lithium iron phosphate battery pack, a battery management system (Battery Management System, BMS), a converter device (rectifier, inverter), a central monitoring system, and a transformer.

    What is lithium iron phosphate battery?

    Lithium iron phosphate battery has a high performance rate and cycle stability, and the thermal management and safety mechanisms include a variety of cooling technologies and overcharge and overdischarge protection. It is widely used in electric vehicles, renewable energy storage, portable electronics, and grid-scale energy storage systems.

    Are lithium ion phosphate batteries the future of energy storage?

    Amid global carbon neutrality goals, energy storage has become pivotal for the renewable energy transition. Lithium Iron Phosphate (LiFePO₄, LFP) batteries, with their triple advantages of enhanced safety, extended cycle life, and lower costs, are displacing traditional ternary lithium batteries as the preferred choice for energy storage.

    What is a lithium-iron phosphate (LFP) battery?

    These batteries have gained popularity in various applications, including electric vehicles, energy storage systems, and consumer electronics. Lithium-iron phosphate (LFP) batteries use a cathode material made of lithium iron phosphate (LiFePO4).

    What is a lithium iron phosphate battery circular economy?

    Resource sharing is another important aspect of the lithium iron phosphate battery circular economy. Establishing a battery sharing platform to promote the sharing and reuse of batteries can improve the utilization rate of batteries and reduce the waste of resources.

    What are the advantages of lithium iron phosphate battery?

    Lithium iron phosphate battery has a series of unique advantages such as high working voltage, high energy density, long cycle life, green environmental protection, etc., and supports stepless expansion, and can store large-scale electric energy after forming an energy storage system.

  • What is the difference between power batteries and energy storage batteries

    What is the difference between power batteries and energy storage batteries

    Unlike energy batteries, which prioritize long-term energy storage, power batteries are optimized for high power discharge when needed, especially in applications like electric vehicles, power tools, and systems requiring quick acceleration or heavy loads.


    FAQs about What is the difference between power batteries and energy storage batteries

    What is the difference between Power Battery and energy storage battery?

    1. The difference between the capacity of power battery and energy storage battery In the case of all new batteries, the battery capacity is tested by a discharge meter. Generally, the capacity of power lithium battery is about 1000-1500mAh; the capacity of energy storage lithium battery pack is above 2000mAh, and some can reach 3400mAh. 2.

    What is a power battery?

    Unlike energy batteries, which prioritize long-term energy storage, power batteries are optimized for high power discharge when needed, especially in applications like electric vehicles, power tools, and systems requiring quick acceleration or heavy loads. Primary functions: Supply rapid bursts of energy.

    What are the advantages of a power battery?

    Power output: Power batteries have high power output capability and can quickly release energy when necessary. Energy batteries provide long-term stable and consistent power supply, emphasizing continuous energy output. Charging and discharging rates:

    What is the difference between battery power and energy?

    Batteries aren't free, and neither is that stuff coming out of your electrical outlet. So, power measures how fast the pennies are draining out of your wallet! Also, energy is...energy. It comes in many, potentially harmful, forms -- heat, radiation, sound, nuclear, etc. --,and more power means more energy.

    What is an energy battery?

    An energy battery, also known as a high-energy battery, is a rechargeable battery designed to store and release energy over an extended period. These batteries are optimized to provide sustained power output, making them ideal for applications requiring long-lasting energy storage and usage. Primary functions: Store energy for extended periods.

    How do energy storage batteries work?

    In the energy storage system, the energy storage lithium battery only interacts with the energy storage converter at high voltage, and the converter takes electricity from the AC grid to charge the battery pack; or the battery pack supplies power to the converter, and the electrical energy is supplied by the converter.

Energy Storage & Microgrid Technical Insights