I've decided to switch to LED at last, after seeing some truly amazing yields under that kind of light.
Here is a specific question about my setup:
I plan to run Cree3590 3500K 36W CD bin at as much as 2100 mA, so they will produce considerable heat. I've decided to cooltube them - placing a COB onto radiator and enclosing the radiators (4 in a row) into ventilation channel. That, in my opinion, combined with proper air circulation, should do the trick.
Of course I would not run them at 2100the whole grow, only in late veg - early flower (not sure yet) and mid-late flower (pretty sure).
Will it be safe for COB's to run at such power? Will it shorten their lifetime, cause them to degrade?
I never tried to count the heat exchange by the way (drivers should be cooled the same way, with radiators), but I am guessing that 900 square ft2 / hour of air should be able to keep 12 COB's and their 3 drivers nice and cool. Any opinions about that guess? Any experience on running COB's at 2/3 of their capacity?