Quote Originally Posted by Weezard
Use the actual power draw of 24 Watts.

24 X 70 = 1680 lumens per lamp.
Times 4 lamps = 6,720 lumens

The 125 W. rating is supposedly a comparison to incandescent lights.
It takes 125 W. of incandescent light to produce the same 1680 lumens.

Yes, those will do fine for vegging.
You might want to "kick it up a notch" when it's time to flower.

Don't expect trees of course, but a skillful grower can make do with 96 Watts of cfls

Aloha,
Weezard
thanks for quick response , so it means i need to buy some higher w cfl light ? i just installed the bulb connector , do u think i can use with HPS bulb as well, how much w of HPS bulb i shud buy is suit for 40cm x 40cm x 60 cm grow box ?