Using PAR Meters and Sensors For Plant Growing

Our Story: Forever Green is the largest US maker of Far Red Grow Lights. We ship direct from our warehouse (no drop shipping). 60 day returns with free expedited ground shipping to the lower 48 states. And low cost expedited shipment worldwide. Volume pricing available. Overview  Rugged, waterproof, glass lens, 100-277 VAC. This unit is built to last.  Our far red lightbar is the most popular 4' long 730nm grow light on the market today. Industrial grade construction. All aluminium housing. Internal LED driver.  About Growing with Far Red Energy Far-red light is good for plant growth. It can increase photosynthesis, enhance growth, and increase plant size. Far-red light is significant to plants because it increases the ability of plants to capture light. Plants use light not only as a source of energy, but also for information about the surrounding environment. Far-red light is typically not absorbed much by plant leaves, and it doesn't drive any photosynthesis because it is mostly reflected off leaves. However, if a plant "senses" a greater ratio of far-red to normal light then it "knows" that obstructions or other plants are close to it. Far-red light can also regulate leaf angle and increase plant height and leaf area, via expression of associated genes, to capture more light energy. The lightbar features a crystal lens that covers the diodes, making it waterproof and resistant to overspray. Additionally, the lightbar is designed to be easily moved and bumped around, making it one of the most versatile and user-friendly grow lights on the market. However, what sets this light apart from others is its ability to stimulate plant morphology. By emitting a high intensity of far red light, the FGI Far Red Lightbar encourages plant growth and development, making it the perfect choice for any serious gardener or farmer. Use far red energy in veg to keep plants compact and strong. Recent studies at Utah State University by Dr Bruce Bugbee, have proven that additional energy, even in the red spectrum, keeps plants more compact.  The science of using far red light on plants Recent studies at the University of Texas El Paso / University of Texas Arlington, concluded that plants exposed to full spectrum plus dosing with far red spectrum, increased overall plant mass/yield and also improved terpene profiles. Read the study here. The light coverage of this product is unmatched. It will fully cover a 4' wide grow tray in bloom and generally covers a 2' wide swath. We recommend a pair for each 4x4 grow space and this unit comes with hardware which allows you to position it inside the frame of most 5 and 8 bar full spectrum LEDs. This light system is one of the best on the market and will give your plants the light they need to thrive. Order now and be sure to get your grow space set up correctly so you can achieve maximum light coverage. Targeting the Emerson Effect. The Emerson Effect is the name given to the increase in the rate of photosynthesis that occurs when chloroplasts are exposed to far red energy just before the nighttime lights off cycle. This effect was first discovered by scientist Alexander Emerson in 1883, and it has since been extensively studied by plant biologists. While the Emerson Effect is typically associated with increases in photosynthesis, it can also lead to other changes in plant physiology, such as increased cell division and growth. One way to take advantage of the Emerson Effect is to use our supplimental far red LED grow light for 10-15 minutes after full spectrum lights are turned off. If you are looking to create the ideal environment for your plants, an LED grow light can help you to achieve the Emerson Effect.   Far Red Spectrum Use We recommend 2 units per 4x4 grow space for daytime enhanced PPFD delivery. Height over canopy should be the same as your full spectrum LED but it will not hurt the plants to hang beneath a 4x4 LED.  Time General use: Studies indicate that dosing with far red light is most effective with 4 hours on, 4 off, and 4 on. We recommend a digital wall timer, or if using TrolMaster the DSP-1 (for 110V connections) or a DSP-2 (for 240V).  Emerson Effect:  10-15 minutes after full spectrum lights are turned off. Plant Morphology Theory Plants use phytochrome to detect and respond to red and far-red wavelengths. Phytochromes are signaling proteins that promote photomorphogenesis in response to red light and far-red light. Phytochrome is the only known photoreceptor that absorbs light in the red/far red spectrum of light (600-750 nm). (source: Wikipedia) Far Red light is believed to create a competitive response in plants, pushing desirable terpene production and assisting in the formation of trichomes.   Read more about Far Red and extended spectrum in this recent release from Design Lights Consortium: Read It Here   ~Technical Specs~ Product 30W（±5%） PPF 72.1 umols/s  100-277VAC,50/60 Hz 102.3BTU IP65 44.88”x 2.24”x 1.53” 4.4 lbs Photometric Test Report Download  Product Warranty (see our warranty here) 3 year warranty

Affordable, compact, extended far red spectrum LED grow light for plants of all types.    Growing tomatoe starts with the FGI Square 2   The FGI Square 2 is an excellent entry level LED grow light for those looking to give their plants the sun's energy. Unlike other lights on today’s market that only provide certain colors needed by plant life (or lack thereof), this one provides all the necessary components: red, orange, yellow green and blue spectrum which together make up the building blocks for successful photosynthesis (and closely matches our sun).  If you are looking for an easy to use LED to learn how to grow any plant types indoors, look no further than the FGI Square 2. Well loved by gardeners everywhere. Designed in the USA by Forever Green Indoors in Seattle WA. Plant lighting LED light experts since 2013. Use the Square 2 to grow all types of plants. Placing the light closer to the plants provides enough energy to match the summer sun. Pulling the light further away, or using the built in dimming, provides the right energy for starts and seedlings.  Learn more about the FGI Square 2 on our YouTube Channel here:  The Square 2 is one of the more efficient grow lights on today's market, using only 220 watts! This means it can produce far less heat than higher wattage lamps. We designed it to deliver the perfect balance of light. It's full spectrum white LEDs help plants grow healthy while adding 5% total deep as well as far-red diodes for an extended range that will optimize your plant growth! Key Features:  Compact size: 20" x 20" x 3" Lightweight: 10 lbs  Built in dimming knob: Adjusts levels for young to mature plants.  Spectrum: Full spectrum plus 5% 660nm deep red plust 730nm far red LED diodes.  Includes: 110V power cord. Two clip and steel cable wire hangars. Product manual.    Technical  PAR Chart at 24" From Diodes The right kind of light can make all the difference for your plants. Flowers, fruits and other high energy use types require levels as high as 1000 PPFD - a measurement that approximates natural sunlight. Spectrum From Our Sun   We design grow lights to closely mimic natural sunlight (shown above). Although it's not possible to exactly duplicate a giant burning ball of hydrogen, we get as close as possible with the Square 2.   Spectrum from the Square 2     Don't wait! We have limited stock on this LED. Buy yours today.     ~Technical Specs~ProductDiodes (White) Brand name: Shenzhen LidedaNumber of pieces 360Total Diode Wattage Capacity (not actual draw) 300WMaximum Advertised Wattage 300Equivalent Wattage 1000CCT 4000KCRI 80CRIOther color Diodes (Red)Brand Name: Shenzhen LidedaNumber of pieces 96CCT NAWavelength 655-665nmOther color Diodes (FR) Brand Name: Shenzhen LidedaNumber of pieces 24CCT NAWavelength 730-745nmRatio mix white/red (%) 3:1 Projected Diode Lifetime (L-90) - in hours 50,000 hours Photosynthetic Light Measurements PPF Output* 436.1 umol/sPPF Efficacy* PPF 2.1umol/J PPFD Output 900 umols/ms at 24" below diodes Photopic Light MeasurementsLuminous Flux* 30342lmLuminous Flux Efficacy 151.7lm/w Other Input Power Watts 218Input Voltage 110VCord length 8' (2.44m, 18AWG )Plug type (note if bare whip) Molded 110V Product Dimensions Dimensions W x L x H (inches) 20x20x3.5Weight (pounds) 10Operating Temp range (F) -20℃ — +40℃IP rating (UL-ETL or estimated final UL-ETL)IP（UL- UL-ETL） IP20 Physical Dimensions Package Dimension W x L x H (inches) 24x23x5Inner carton (Yes/No) NOInner Carton Weight NOMaster Outer carton (Yes/No) YESNumber of pieces in Master Carton (1, 2, 3) 1Master carton weight (lbs) 2 Dimming / Tuning Dimming (Yes/No) Yes Product Warranty (against manufacturing defects) 3 years Warranty does not include coverage for damage caused by water or exposure to VOC's or electrical damage caused by voltage spikes. We recommend using a basic power surge suppressor such as those found on power strips to protect your light from utility power outages. 

Looking for a top-quality LED grow light that will give you the best results? Look no further than the FGI Square 3! This full spectrum light is perfect for flowering plants, and can be used from seedling all the way to harvest. The innovative square design of the FGI Square 3 provides maximum light coverage and intensity, so you can be sure your plants are getting everything they need to thrive. The extended PAR spectrum delivers all the wavelengths your plants need for healthy growth, and the built-in dimming function allows you to customize the light output to suit your plants' needs. Learn more about the FGI Square 3 on our YouTube Channel here:  So don't wait any longer, order your FGI Square 3 today and see the amazing results for yourself! The FGI Squre 3 Over Annual Starts The FGI Square 3 LED Grow Light is perfect for the passionate indoor gardener. With a full spectrum plus deep red plus far red diodes, you can grow your plants from start to finish with ease. The square within a square design, unique to FGI, maximizes light coverage and intensity, giving your plants the light they desire to thrive. With 320 watts of power, this grow light is sure to give your plants the boost they need to grow big and strong. Order your FGI Square 3 today and start growing like a pro! Key Features:  Compact size: 22" x 22" x 3" Lightweight: 13 lbs  Watts Consumed: 320 Built in dimming knob: Adjusts levels for young to mature plants.  Spectrum: Full spectrum plus 5% total 660nm deep red and 730nm far red LED diodes.  Includes: 110V power cord. Two clip and steel cable wire hangars. Product manual.    Technical    Spectrum From Our Sun   The right kind of light can make all the difference for your plants. Flowers, fruits and other high energy use types require levels as high as 1000 PPFD - a measurement that approximates natural sunlight. We design grow lights to closely mimic natural sunlight (shown above). Although it's not possible to exactly duplicate a giant burning ball of hydrogen, we get as close as possible with the Square 3.  FGI Square 3 Extended Spectrum   Don't wait! We have limited stock on this LED. Buy yours today.  ~Technical Specs~Product DiodesBrand name: Shenzhen LidedaNumber of pieces 960CCT 4000KCRI 80CRIOther color Diodes (Red)Brand Name: Shenzhen LidedaNumber of pieces 256CCT NAWavelength 655-665nmOther color Diodes (FarRed)Brand Name: Shenzhen LidedaNumber of pieces 64CCT NAWavelength 730-745nmRatio mix white/red (%) 3:1 Product Warranty/LongevityLifetime (L-90) - in hours 50,000 hours Photosynthetic Light Measurements PPF Output* 700 umol/sPPF Efficacy* PPF 2.3 umol/J PPFD: 1100 umols/ms at 24" (peak) Photopic Light MeasurementsLuminous Flux* 50,000 lmLuminous Flux Efficacy 160 lm/w Other Input Power Watts 310WInput Voltage 110VCord length 8' (2.44m, 18AWG )Plug type (note if bare whip) Molded 110V Product Dimensions Dimensions W x L x H (inches) 22 x 22 x 3.5Weight (pounds) 13 Operating Temp range (F) -20℃ — +40℃ IP rating IP20 Rating CSA Physical Dimensions Package Dimension W x L x H (inches) 27 x 26 x 6.5 Dimming / Tuning Dimming (Yes/No) Yes Product Warranty: 3 yearsWarranty does not include coverage for damage caused by water or exposure to VOC's or electrical damage caused by voltage spikes. We recommend using a basic power surge suppressor such as those found on power strips to protect your light from utility power outages.

  DESCRIPTION Rugged, waterproof, glass lens, 100-277 VAC. This unit is built to last.  Designed to match natural sunlight levels, the FGI UVA LED Grow Light offers extended spectrum Supplemental Blue 340-400 nm with an added PAR Booster to ensure optimal absorption of the light energy. Perfect for indoor growers and plant enthusiasts! The reason for this is that plant morphology is affected by the spectral composition of light, which means that different wavelengths of light can promote different plant growth. In particular, blue light is known to encourage compact growth and strong stems, making it an essential part of plant development. By providing plants with the same level of blue light as they would receive from the sun, the FGI 385nm UV Lightbar ensures that they can grow and develop in the best possible way. As a result, it is an invaluable tool for any gardener or plant lover who wants their plants to thrive. Science behind using UV-A supplemental energy on plants Recent studies at Utah State University have shown that plants absorb and benefit from light between 380-740NM. This research has led to the study of E-PAR or extended PAR and is redefining measurement of photosynthetic light.  Below are the spectrum charts which compare natural sunlight to full spectrum LEDs and then to full spectrum plus supplemental UV.  The result is a closer match to sunlight providing more of the beneficial blue light that plants benefit from.  Sunlight Levels of 380NM UV Natural sunlight provides plants 1.22 umols of 380nm blue energy.  Natural Sunlight Spectrum Blue Energy 1.2234 umols Typical Full Spectrum LED Lack 380NM UV Full spectrum LEDs have limited blue spectrum which peak at 460nm.   Full Spectrum LED 460nm Blue Energy Levels .0514 umols Full Spectrum LED with Supplemental 380NM UV  Adding supplemental 385NM UV creates a secondary peak of blue energy at 1.5047 umols at 12" from the canopy, roughly equaling natural sunlight.  Supplemental UV Spectrum plus Full Spectrum Blue Energy 1.5047 umols (3x greater)  Build Quality These are high quality units with a crystal glass lens cover to protect the diodes and allow for cleaning. The all aluminum frame dissipates what little heat the bar creates. At 30 watts the Lightbar sips energy too.  Spectrum Theory  Blue energy is scientifically known to help form more compact plants. More lush leaf growth, stronger and larger stems and tighter internodal spacing. We gave a prominent researcher at a major State University one our 385NM UVA Lightbars:  "Your UVA lights arrived and we have confirmed their 385 nm peak. This looks like a high quality fixture." He went on to say: "Elevated exposure to UV photons is known to enhance the synthesis of UV blocking compounds in the leaves of many species and it is reasonable to think that UV photons can increase the synthesis of secondary metabolites in plants." And further, "I expect we will find value in dosing of CSat plants with UV photons, but not surprisingly, the effects will likely interact with UV wavelength, intensity, timing of delivery, and growth stage." The UVA Lightbar fits neatly inside the frame of our Uniformity Pro LEDs as well as many other multi-bar style full spectrum LEDs. Use We recommend two of our UV-A LEDs over each 4'x4' area. The slim design allows them to be hung inside the frame of most 6 and 8 bar LEDs. Mounting height should be at the same level to avoid creating shadowing.  Control A basic digital 110V wall timer can be used, or if using the TrolMaster Hydro X we recommend the DSP-1 module for 110V or DSP-2 for 120V power connection and multiple on/off timer programming.   ~Technical Specs~ Product 30W（±5%） 20 UVA Diodes Per Bar 100-277VAC,50/60 Hz 102.3BTU IP65 44.88”x 2.24”x 1.53” 4.4 lbs Photometric File Download Product Warranty (see our warranty here) 3 year warranty

Our Story: Forever Green is the largest US maker of Far Red Grow Lights. We ship direct from our warehouse (no drop shipping). 60 day returns with free expedited ground shipping to the lower 48 states. And low cost expedited shipment worldwide. Volume pricing available. Rugged, waterproof, glass lens, 100-277 VAC. This unit is built to last.  The FGI Far Red LED Grow Light is the best dedicated far red LED grow light on the market today. It is built with a rugged all aluminum body that dissipates heat well, making it ideal for difficult indoor grow rooms. The lightbar also features a crystal lens that covers the diodes, making it waterproof and resistant to overspray.  About Growing with Far Red EnergyFar-red light is good for plant growth. It can increase photosynthesis, enhance growth, and increase plant size. Far-red light is significant to plants because it increases the ability of plants to capture light. Plants use light not only as a source of energy, but also for information about the surrounding environment.Far-red light is typically not absorbed much by plant leaves, and it doesn't drive any photosynthesis because it is mostly reflected off leaves. However, if a plant "senses" a greater ratio of far-red to normal light then it "knows" that obstructions or other plants are close to it.Far-red light can also regulate leaf angle and increase plant height and leaf area, via expression of associated genes, to capture more light energy. If you're serious about getting the most out of your plants, you need to make sure they're getting the right kind of light. Our far red LED grow lightbar is specially designed to boost photosynthetic light levels in both veg and flower. Adding two of these bars to your 4x4 grow space will lift PAR by 10%. This means healthier plants and bigger yields come harvest time. So if you're ready to take your growing operation to the next level, pick up our far red LED grow lightbar today. You won't be disappointed. Use far red energy in veg to keep plants compact and strong. Recent studies at Utah State University by Dr Bruce Bugbee, have proven that additional energy, even in the red spectrum, keeps plants more compact.  The science of using far red light on plants Recent studies at the University of Texas El Paso / University of Texas Arlington, concluded that plants exposed to full spectrum plus dosing with far red spectrum, increased overall plant mass/yield and also improved terpene profiles. Read the study here. The light coverage of this product is unmatched. It will fully cover a 4' wide grow tray in bloom and generally covers a 2' wide swath. We recommend a pair for each 4x4 grow space and this unit comes with hardware which allows you to position it inside the frame of most 5 and 8 bar full spectrum LEDs. This light system is one of the best on the market and will give your plants the light they need to thrive. Order now and be sure to get your grow space set up correctly so you can achieve maximum light coverage. Targeting the Emerson Effect. The Emerson Effect is the name given to the increase in the rate of photosynthesis that occurs when chloroplasts are exposed to far red energy just before the nighttime lights off cycle. This effect was first discovered by scientist Alexander Emerson in 1883, and it has since been extensively studied by plant biologists. While the Emerson Effect is typically associated with increases in photosynthesis, it can also lead to other changes in plant physiology, such as increased cell division and growth. One way to take advantage of the Emerson Effect is to use our supplemental far red LED grow light for 10-15 minutes after full spectrum lights are turned off. If you are looking to create the ideal environment for your plants, an LED grow light can help you to achieve the Emerson Effect.   Far Red Spectrum Use We recommend 2 units per 4x4 grow space for daytime enhanced PPFD delivery. Height over canopy should be the same as your full spectrum LED but it will not hurt the plants to hang beneath a 4x4 LED.  Time General use: Studies indicate that dosing with far red light is most effective with 4 hours on, 4 off, and 4 on. We recommend a digital wall timer, or if using TrolMaster the DSP-1 (for 110V connections) or a DSP-2 (for 240V).  Emerson Effect:  10-15 minutes after full spectrum lights are turned off. Plant Morphology Theory Plants use phytochrome to detect and respond to red and far-red wavelengths. Phytochromes are signaling proteins that promote photomorphogenesis in response to red light and far-red light. Phytochrome is the only known photoreceptor that absorbs light in the red/far red spectrum of light (600-750 nm). (source: Wikipedia) Far Red light is believed to create a competitive response in plants, pushing desirable terpene production and assisting in the formation of trichomes.   Read more about Far Red and extended spectrum in this recent release from Design Lights Consortium: Read It Here       ~Technical Specs~ Product 30W（±5%） PPF 72.1 umols/s  100-277VAC,50/60 Hz 102.3BTU IP65 44.88”x 2.24”x 1.53” 4.4 lbs Photometric Test Report Download  Product Warranty (see our warranty here) 3 year warranty

  Quality Made LED Lighting For Healthy Clones and Starts Overview  Introducing our new FGI Flexi-Clone LEDs. Each set is linkable to a single 110V connection (220V optional with an accessory plug installed). Daisy chain up to 60 bars to run your entire plant propagation area.   We've designed this light to provide perfect light intensity and an ideal spectrum for growing cuttings and clones.  Competitive Compare to other plastic clone/seedling lights and you'll see why people choose the flexi-clone system instead. At Forever Green we design lights here in the USA based on feedback from experienced growers. Each design is tested in actual commercial grow facilities to ensure the work great. The FlexiClone system is awesome. Your plants will love this light.  Description  Our new 25 watt LED grow light set is ideal for clones and young veg plants. Each bar covers a 4' long by 12" wide area at 12-15" from the top of the plants/seedlings.  Sold as as set of two bars, use two of the Flexi-clone bars to cover 4' long shelves and up to 24" of width. Benefits Using our tried a true light spectrum recipe, we use neutral white and cool white diodes to create the ideal environment for young plants.  Daisy chain up to 30 Flexi-clone bars on a single 110V plug in (or optionally remove the 110V plug and instead use 220V power and daisy chain up to 60 bars).     Unboxing and Installation Video  ~Technical Specs~ Product FGI Flexi Clone LED Grow Light (set of two) Light Source LED Spectrum 4506 CCT Warm White / Neutral White mixPhotosynthetic Light MeasurementsPPF Output* 69 umols/ms PPF Efficacy* 2.30 Umol/sec/wPPFD @ 12" 115 Umol/m²/sFixture coverage ( max intensity / max uniformity )* 4' x 1' per LED / 4' x 2' per set of two LEDsPhotopic Light MeasurementsLuminous Flux* 8,229 LumensLuminous Flux Efficacy* 136.2 Lm/wIlluminance @ 12" 32,069 LuxOtherInput Power 25 watts per barInput Voltage 100-277VAC autosensingDimensions 47.2”x 1.89”x 1.3”Weight 1.1 lbsOperating Temp range 32 F - 104 FThermal Management PassiveRecommended Mounting height 12" Dimming / Tuning No Product Warranty (see our warranty here) 5 years

FGI Uniformity Pro Flex WiFi Controlled 630W LED Grow Light with WeatherEFX. This high-performance LED light is ideal for use in both commercial and home grow operations, and offers a number of features that make it a top choice for professional growers. The Uniformity Pro Flex uses cutting-edge technology to deliver superior light uniformity across the entire footprint, making it an ideal choice for evenly lit grow spaces. With full spectrum white light plus red and adjustable output levels, this grow light can be tailored to meet the specific needs of your plants. "This light really does deliver" But don't take our word for it...check out the product review from Migro: "The best uniformity figure of any fixture I've ever tested". And, "An order of magnitude better, in terms of light uniformity". And, "It does really push the limits in terms of PAR intensity in a 4x4 grow area".    Shane from Migro  Looking to get the most out of your grow lights? The WeatherEFX LED Grow Lighting Controller can help you mimic natural sunlight conditions, promoting healthy plant growth. Wifi Controller Manual and Troubleshooting Guide  The controller uses weather data to adjust the light intensity and spectrum of your LEDs, simulating changing light conditions throughout the day.  You can also create custom on/off schedules and scenarios, such as sunrise/sunset, to further customize your lighting. Plus, the controller's Cloud Intelligence feature allows you to check in on your lights from anywhere. Take your garden to the next level with more natural lighting using FGI's weatherEFX. Learn about Cloud Intelligence and our Wifi Controller on our YouTube Channel here:           The WeatherEFX concept in science is based on the idea that changes in weather can have a significant impact on plant growth and development. The term was first coined by botanists studying the effect of leaf shading and competitive growth responses in subalpine herbs. They found that a reduction in sunlight due to clouds results in increased water status and CO2 uptake throughout the day. This allows plants to benefit from the periodic reduction of evaporative demand that results from natural periods of intermittent shade. WeatherEFX has since been applied to other areas of research, including agriculture, where it is used to study how changes in precipitation and temperature can affect crop yields. It is also being used to investigate how extreme weather events, such as heat waves and drought.  The Flex is a top-quality grow light that won't break the bank? Check out the FGI Uniformity Pro grow light with IOT Control. This lightweight (just 30 lbs) and slim (3" deep) grow light is perfect for 4x4 spaces, and its cool design means it won't add too much heat to your grow room. The four push button dimming settings allow you to customize the light intensity to suit your plants' needs, while the red booster spectrum helps you grow larger, denser flowers. Super bright full spectrum 4000K diodes operate at an efficent 2.3umols/j plus 660nm red energy.     PAR Map @ 16" from canopy FGI Spectrum  Product Manuals: Uniformity Pro Flex User Manual Wifi Controller Manual and Troubleshooting Guide  ~Technical Specs~ INPUT/OUTPUT:  630 W 1600 PPF  2.60 umols/j 120V Plug Included110-277V SIZE:46" x 43" x 5"30 Lbs SPECTRUM:3950 CCTWarm White + Cool White + 660 NM Red80 CRI DIODES:LumiLED + CREEE2,640 TtlRatio: 65:33:2 (warm/cool/red) IP65 Damp Rated DLC Listed CSA Certified Product Warranty: 5 years

DESCRIPTION Rugged, waterproof, glass lens, 100-277 VAC. This unit is built to last.  The FGI 385nm UV Lightbar is designed to provide targeted supplemental blue energy to equal natural sunlight levels. At Forever Green, we strive to match natural sunlight with our lighting products. The reason for this is that plant morphology is affected by the spectral composition of light, which means that different wavelengths of light can promote different plant growth. In particular, blue light is known to encourage compact growth and strong stems, making it an essential part of plant development. By providing plants with the same level of blue light as they would receive from the sun, the FGI 385nm UV Lightbar ensures that they can grow and develop in the best possible way. As a result, it is an invaluable tool for any gardener or plant lover who wants their plants to thrive. Science behind using UV-A supplemental energy on plants Recent studies at Utah State University have shown that plants absorb and benefit from light between 380-740NM. This research has led to the study of E-PAR or extended PAR and is redefining measurement of photosynthetic light.  Below are the spectrum charts which compare natural sunlight to full spectrum LEDs and then to full spectrum plus supplemental UV.  The result is a closer match to sunlight providing more of the beneficial blue light that plants benefit from.  Sunlight Levels of 380NM UV Natural sunlight provides plants 1.22 umols of 380nm blue energy.  Natural Sunlight Spectrum Blue Energy 1.2234 umols Typical Full Spectrum LED Lack 380NM UV Full spectrum LEDs have limited blue spectrum which peak at 460nm.   Full Spectrum LED 460nm Blue Energy Levels .0514 umols Full Spectrum LED with Supplemental 380NM UV  Adding supplemental 385NM UV creates a secondary peak of blue energy at 1.5047 umols at 12" from the canopy, roughly equaling natural sunlight.  Supplemental UV Spectrum plus Full Spectrum Blue Energy 1.5047 umols (3x greater)  Build Quality These are high quality units with a crystal glass lens cover to protect the diodes and allow for cleaning. The all aluminum frame dissipates what little heat the bar creates. At 30 watts the Lightbar sips energy too.  Spectrum Theory  Blue energy is scientifically known to help form more compact plants. More lush leaf growth, stronger and larger stems and tighter internodal spacing. We gave a prominent researcher one of our UV-A LEDs and he said:  "Your UVA lights arrived and we have confirmed their 385 nm peak. This looks like a high quality fixture." He went on to say: "Elevated exposure to UV photons is known to enhance the synthesis of UV blocking compounds in the leaves of many species and it is reasonable to think that UV photons can increase the synthesis of secondary metabolites in plants." And further, "I expect we will find value in dosing of CSativa plants with UV photons, but not surprisingly, the effects will likely interact with UV wavelength, intensity, timing of delivery, and growth stage." The UVA Lightbar fits neatly inside the frame of our Uniformity Pro LEDs as well as many other multi-bar style full spectrum LEDs. Use We recommend two of our UV-A LEDs over each 4'x4' area. The slim design allows them to be hung inside the frame of most 6 and 8 bar LEDs. Mounting height should be at the same level to avoid creating shadowing.  Control A basic digital 110V wall timer can be used, or if using the TrolMaster Hydro X we recommend the DSP-1 module for 110V or DSP-2 for 120V power connection and multiple on/off timer programming.   ~Technical Specs~ Product 30W（±5%） 20 UVA Diodes Per Bar 100-277VAC,50/60 Hz 102.3BTU IP65 44.88”x 2.24”x 1.53” 4.4 lbs Photometric File Download Product Warranty (see our warranty here) 3 year warranty