so I have seven 42W CFL's 2700K in my flowering room. each of them provides 2700 lumens. so in total I have 19 000 lumens and almost 300W in my closet...
I dunno how many lumens 300W HPS would provide (it's gonna be more of course, but not too much I guess) but there are several things I like about CFL's:
*I don't have "too big temperature in my flowering room" problem. when the lights are on (7 CFL's) temperature rises 4-5 degrees in celcius.
*I can always remove as many CFL's as I want if there's (lets say) just one plant in flowering room.
*In my opinion, light is more spreaded more evenly (I'm doing SCROG right now)
*I bought my CFL's in WAL*MART, and each set (light bulb $8.00 + reflector with 15 feet cord $5.00) cost me around $14.00 each. so around $100.00 in total...