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LED UVA PR 385nm 30w grow light

£135.00

Housing material Aluminum

Optics materials Ultra Clear Glass or Quartz Glass

Radiation angle 120°

Protection degree IP65 (dust and watertight)

Built-in driver, easy installation.

FCC, CE, ROHS, ETL certificate.

9 in stock

SKU: uva30w Categories: ,

Description

LED UVA PR 385nm 30w grow light

https://ledhydroponics.co.uk/product/led-uva-30w/

Description

LED UVA PR 385nm 30w grow light

Product features

Housing material Aluminum

Optics materials Ultra Clear Glass or Quartz Glass

Radiation angle 120°

Protection degree IP65 (dust and watertight)

Built-in driver, easy installation.

FCC, CE, ROHS, ETL certificate.

Specifications

Technical data

Power  30W±5%
Item No. HL17
Power Input  100-277VAC,50/60 Hz
Current Range  0.3A @ 100V, 0.11A @ 277V
Isolation Class Class I
Heat BTU Generated 102.3BTU
Power Factor 0.9
Warranty 2 years50000H @ 25℃

Dimensions  605 x 57 x 31mm 23.82” x 2.24” x 1.22 1145 x 57 x 31mm 45.08”x 2.24” x 1.22”

Operation conditions  0°C to 40°C / 32°F to 104°F (95% RH)

Storage conditions   -40°C to 70°C /-40°F to 158°F (85% RH)

UV Pro datasheet

PDF

 

Why You Should Include UV-A In LED Grow Lights

Many growers misunderstand ultraviolet light.  They think that it will always hurt their plants.  Or, they think that only UV-B is helpful in increasing the medicinal quality of plants.  Both those statements are untrue. …

What is UV?

Atmospheric filtering of UV.

UV is electromagnetic radiation just beyond visible light in energy but lower in energy than x-rays.  They range from 400 nm to 10 nm (which is a greater wavelength diversity than visible light, ranging from 400 to 700 nm).  For plants, there are two relevant types of UV: UV-A and UV-B.  UV-A is the lowest energy UV and ranges from 400 nm to 315 nm.  UV-B is higher energy than UV-A and ranges from 315 nm to 280 nm.  At sea level near the equator, 6% of solar radiation is UV – 5.7% is UV-A and 0.3% is UV-B.  Depending on latitude, elevation, and time of year, plants receive 10 to 100 times more UV-A than UV-B.  Higher energy UV light, such as UV-C, is filtered out by our atmosphere and doesn’t reach Earth’s surface. (And thank goodness!  UV-C is quite dangerous to living organisms.)

Reason 1 to use UV-A: It Can Increase Plant Yields

The effects of UV light on plants is a highly investigated topic with research spanning decades.  Why is there so much research on this topic?  Greenhouses primarily.  Agriculture within greenhouses is a multi-billion dollar industry and most greenhouses are UV deficient because the most common material that covers greenhouses block UV, such as glass or polycarbonate.

Much of the initial studies on the effects of UV confused the subject.  These studies only used parts of plants – chloroplasts or thylakoids – and not whole leaves or by tracking a plants growth over time.  These incomplete studies wrongly gave UV a reputation that it didn’t deserve and underestimated the ingenuity of plants that have become highly adapted to UV.  Below is a sampling of research that tells the complex, multifaceted, and often species dependent responses to UV.

Utah State University’s Hemp Research Could Have Major Implications On Growing Cannabis

Led by Professor Bruce Bugbee in the United States, Utah State University (USU) has been at the forefront in cannabis research, specifically in the cultivation and sale of medical hemp. Known for his work with NASA and the cultivation of crops beyond Earth, Bugbee is a self-proclaimed cannabis myth-buster who prides himself on his research into the fascinating crop.

While Bugbee’s research is still legally within its infancy — thanks to the 2018 Farm Bill — he and his team are already turning up results that will make the vast majority of cannabis growers take heed.

Irrigating Cannabis Is No Different From Other Crops

Transitioning to a high phosphorus fertilizer for the flowering stage of cannabis is a common growing practice promoted by both commercial gardeners and de facto sages in the field. However, within the last few years, more and more cannabis growers are finding success in running a single NPK ratio throughout all growth stages. According to Bugbee and his team’s research, they may be on to something.

Bugbee isn’t one to mix words, saying a 20-10-20 (nitrogen-phosphorus-potassium) fertilizer like Jacks or Peters is best for all stages of cannabis growth when combined with a drain-to-waste peat/vermiculite-based media with supplemental dolomitic lime and gypsum. Other substrate mixtures like coco-coir and perlite work nearly as well, but Bugbee’s is quick to mention the importance of introducing a silica additive in the absence of vermiculite. Bugbee and his team have found increasing phosphorus beyond his recommendation serves no purpose except to pollute the environment.

Bugbee says he and his team find an EC of 1.2-1.3 mS/cm can be given throughout all growth stages. Growers should aim for a 10% runoff that reads between 1-1.5 mS/cm to prevent salt buildups and ensure proper irrigation. Variations in watering frequency determine the overall amount of fertilizer applied.

Efficacy Is More Important Than Spectra For Yield And Cannabinoids

Since their introduction into the world of sole-source lighting for crops, LEDs have been touted as superior to all other lights, namely the king of grow lamps, high-intensity discharge lighting, or HIDs. And while many will acknowledge that these claims were perhaps premature, within the last few years it’s become apparent with the latest advancements in LED technology they were ultimately right.

However, proponents of HID lighting have stuck to their guns, claiming that the UV and far-red photons their lamps’ output deliver a higher quality bud. However, Bugbee and his team say, not so fast. Despite the 2% increase in far-red and introduction of UV light, Bugbee’s found no improvements in cannabinoid levels in cannabis plants grown under HID lamps vs. cool white LEDs.

Temperature Has Major Implications On Cannabinoid Concentrations

Perhaps USU’s most notable finding has been their research on temperature and its effects on yield and cannabinoid concentrations. A slight increase in flower yield was noted when increasing temperatures from 73F to 84F. However, before growers rush to increase temperatures, they should, instead, take a pause and consider lowering them.

When increasing temperature from 73F to 84F, researchers noted close to a 50% decline in cannabinoid concentrations, with a significant drop occurring once temperatures exceed 80F. While the USU team cautions they aren’t sure what to make of this, these findings should make every cannabis grower take serious note.

It appears their findings come from cannabis crops grown under LEDs, where the common advice is to keep temperatures about 5 degrees higher than HID — between 80-85F —  due to their lack of infrared light. This is the range where the biggest decline in cannabinoid concentrations has so far been seen.

Growers May Be Harvesting Too Late

An 8-week flowering time or 56 days after initiating a 12/12 photoperiod has long been the commercial wisdom when it comes to harvesting cannabis. However, within the last few years, many longtime growers, including myself, have promoted caution about harvesting so soon, recommending growers wait until their plants are typically 9-10+ weeks into flowering before harvesting. According to research out of USU, we all could be wrong.

In multiple studies led by Mitch Westmoreland, he and his team have found examples of multiple phenotypes peaking in both THC and CBD concentrations about 40 days after the start of their inductive photoperiod. While ratios of THC and CBD were generally constant throughout the trials, by day 60 and beyond, the team noticed a notable decrease in both THC and CBD concentrations when compared to their peak around day 40.

Westmoreland doesn’t say if growers should start harvesting sooner than typically advised but notes the significance of their findings and that they need to further investigate the issue.

Drought Stress Isn’t A Friend Of Cannabis

Cannabis’ demand for water has long been a thorn in proponents of the crop’s side, with naysayers warning that increasing production could have devastating impacts on the environment. As such, many of the environmental-conscience cannabis growers have made it a priority to reduce water use whenever possible. However, while a noble pursuit, they should tread carefully.

According to USU’s research, water-stressing cannabis plants directly correlated to a decrease in flower yield. Fortunately, cannabinoid concentrations were not seen to experience a decline, and plants were found to bounce back quickly when given adequate water.

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