There is a point of diminishing returns. (overkill) But I have yet to find it. Honestly, I've never looked. I go from CFL's to HPS. Doubtful there is an upper-limit with CFL's, but heat would be the major concern. With HPS set-ups, you risk heat stress and bleaching, but I believe that varies with bulb, distance, ambients, (heat and humidity)....Quote:
Originally Posted by mainegrown