Need more info. How are you venting with the 600w HPS? What is the CFM of the fan? How is it setup - does it vent from the grow room into the fan and out of the closet? To where? Where does the input air originate?

You may be able to solve your fan problems without changing your lights.
bigsby Reviewed by bigsby on . CFL lights bought, anygood. hey.. i bought a 250w CFL light from $35 from someone selling at canplant. Cannabis Forums Message Boards - Marijuana Growing, Medical Marijuana, Cannabis Club, Dispensary, News RSS Feed - PLUG & GROW CFL 250W LAMP BLUE - 6400K CHEAP! LAST STOCK : Classifieds the light is very good for my growth.. i use it with my 250w hps lights... i wanted to know if i can test the lumens on these.. cuz maybe he is selling it cuz they are crap?? not sure.. i need to test them.. how can i? Rating: 5