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in this video half the photons produce more growth due to better spectrum the graph is from Columbia.plants have close to 400 pigments.this graph shows absorption for all of them. this belief is more bro-science plants can adapt to any form of light but provide better taste and potency with...

thats a 5000k light. good for veg but too cold for flowering

before modern 660nm bulbs became available I made an LED pontoon for my T5 using 48 660nm leds driven at 500 ma and it worked great.I used cheap LEDs from ebay for this test and startedd losing diodes after about 6 month. I found that if I put my light closer than 8 inches growth of the top bud...

looks like 2 4 ft 8 bulb lights in a 4 ft by 4 ft grow area. I use a 660nm and FS plus UV bulb in a 6 tube fixture with 4 6500k for flowering in a 2 ft by 4 ft tent and am happy with the results 7%uva 30%red over half the red peaks at 660nm. I have seen a noticable improvement in quality and...

they are full spectrum for the human eye which is what they are made for. they lack some of the wavelengths plants use (violet,UV) some growers add UV bulbs to LED and HPS grow rooms. currently quality LED grow lights cost to much

I'm a T5 grower but when I play with LEDs it's always DIY but for a commercial light I would look for meanwell drivers and 301 diodes

interesting that this study did not test 430nm, the chlorophyll A ps2 absorption peak. they only tested what LEDs can produce efficiently. many companies use junk science to sell their products, I wonder who paid for this study? plants have close to 400 pigments and use a wide range of light

for DIY how much does bridgelux EB gen 3 strips and meanwell drivers cost? https://www.digikey.com/catalog/en/partgroup/eb-series-slim-gen-3/91271?mpart=BXEB-L1190U-35E3000-C-C3&vendor=976 these can be driven at up to 700ma without a heatsink provide uniform light distribution and use the best...

with 2 HPS lights be better of supplementing your spectrum with UV. perhaps 2 of these https://www.amazon.com/dp/B07GBRKXPS/ref=twister_B07GBS5832?_encoding=UTF8&psc=1&coliid=I2WUY5TWO5Q9K3&colid=AW7UKM9ED6GM and maybe some of their 660nm bulbs for increase flowering.I have found that the UV...

I like to play wity LEDs but in my T5tent I veg with 4 6500k then add a FS plus UV and a 660nm bulb for flowering.works great in a 2ft by 4 ft tent with SOG or SCROW

these T5s are more than 1 ft away from the top of the plant more bro science from the LED crowd. I get good buds 2ft below the top of my plant more even coverage

a 6500k produces 2.5% UVA

what which provide nthese lights use for UV are 400nm diodes which provide no UVb and little light at 380nm and lower and have little effect on plants. it is just a sales gimick

your LEDS provied plenty of red but little violet and no UV . a 6500k bulb would complement those LEDs more than the 2700k he may even consider a reptile bulb for a little more UV

the grower is more important than lights CFLs are the worst light use to plants but some growers do very well with them. it would 800 watts of high quality LEDs to match a 1000watt HPS the led generates 480 watts of heat considering the cost difference electrcity is cheap where I live so a...

F24 bulbs are a little less efficient than F54 bulbs. with the new horticultural bulbs you can get as much deep red as you want for flowing

I'm a T5 grower and use retile bulbs for that but when I have a little extra money I like to play with LEDs and this is a pure LED grow.but the new hoticultural bulbs do work.I have been following the coral growers and it seems that some are using 6500k MH bulbs to get UVA and UVB.

I am considering using these to add UVa to a 2ft by 4ft tent grow https://www.amazon.com/dp/B074N26GJT/?coliid=I3U2A1VXVQD21Y&colid=AW7UKM9ED6GM&psc=1&ref_=lv_ov_lig_dp_it any opinions? I am using 4000K bridgelux eb strips for my main light with these for extra red...

I would avoid doing it midday but mornings and late afternoon should be fine

the mars SP 150 looks like a good option https://www.ebay.com/itm/254222124675 I like the large heatsink