The light i recommended, the Rayonled 720 UV is a 720W LED with samsung cool whites, warm whites, osram reds and 380nm-410nm UVs the cool thing is that ALL the UV and a lot of the reds are in 2 separate bars that each add another 40W of UV/IR so that the UV and additions reds can be controlled independently of the rest of the light. Those 2 bars draw a combined 80W and the rest of the light draws 640W. Trust me when i say this light kicks the crap out of
HLG and mars. I mean, the
sp3000 only has 4 FUCKING UV DIODES. Like wtf guys? You did that JUST so you could say it has UV didnt you???? (Clears throat) Sorry about that, anyways.....
Plus it can be used for every stage.. please, if you want to get serious about lighting, and growing the most potent weed you NEED UV. check it out.
Science lesson: trichomes make the plant sticky to attract more pollen, we all know this. However, trichomes and cannabis resins in general are DEFENSIVE MECHANISMS. 2 of the main things they protect the plant from are UV light and cold. So if you give them some UV during week 4 and then POUND the UV into them for the last 2 weeks you will have very frosty nugs. Here are the data and spec sheets for the light
Happy growing
DwJ
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For anyone wondering, this light is around $1500 canadian from growdaddy. 5 year warranty.