Great thread RR.

Ive been looking at lighting for my 1st grow and was going to go with a 250w cfl, thinking it would be cheaper to run. But after reading your 1st post it seems a 250w HPS would actually be cheaper to run plus the added benifit of more lumens. Only downside is the possible heat with the HPS
1zulu1 Reviewed by 1zulu1 on . Answers about CFL, HPS, How Much Light... Although I'm still kind of a new poster, I keep seeing a lot of the same comments--many of which are answered an Dr. Khronik's excellent El Cheapo Guide to Lighting. But there are a few things I'd like to add in regard to watts, lumens, cfl, hps, and efficiency and how much light you need. Maybe this should be stickied? Watts have nothing to do with light or growth. Watts measure how much power a light fixture uses to produce light. You can tell how efficient a light bulb is by looking Rating: 5