So many different kinds of lights. What works? MH, HPS, or CFL? MH, HPS are more expensive to buy and less energy efficient than CF L's. They also put out mass quantities of heat so cooling the lights becomes an issue allthough they work the best i suggest CFL's. CF L's (compact flourescent lights) are cheap, easy to obtain and work great. there ya go do your homework it adds up
(in grams)
good luck