I guess LEDs are out of question. I thought it was going to make my life easier, but thanks to @Rocket Soul and his infrared thermometer + VPD, I will leave it to Beaver.
"The transpiration rate of the plant is driven by changes in vapor pressure deficit (VPD), which is a combined function of...
Trying to keep it simple.
I'm going with 4x kingbrite qb132.
I will source 185 driver locally.
Also will make the frame myself.
What spectrum should I go for?
With epistar red, or add in later as supplement?
Lm301b or *h?
Anyone against this light?