Yes and they also are much better at penetrating dense vegetative growth to help with your yield and for the most part offer a better spectrum of light than regular cfl's.get a hid, in the long run they are cheaper than always re-buying a couple dozen cfls
Everyone thinks this..and rightfully so. I thought lumens were cumuliative like that..til I came on this site. someone correct me if Im wrong, but I dont think lumens add up like that. So you are getting a good dispersal of light...but your lumens are only as high as your brightest bulb.This is my setup - Roughly 25,000 lumens
70w hps - 7000 lumens
65W Large cfl - 4000 lumens
cfl floodlight - 1300 lumens
22w cfl - 900 lumens
both dual florescent light fixtures (4 lights) - 10,600 lumens
18 inch florescent light ?watt- 1000 lumens
this is true grasshoppa diffrnt points of light dnt ++++++up i have to find where i read it but will post it when i find it.... oh yea and their is a thread where a guy grew 1 lb with 1 plant scrog with a 400w in a space like yours(3x3) i will post it tooEveryone thinks this..and rightfully so. I thought lumens were cumuliative like that..til I came on this site. someone correct me if Im wrong, but I dont think lumens add up like that. So you are getting a good dispersal of light...but your lumens are only as high as your brightest bulb.