lumens are a rating of the light coming off the bulb but I generally worry more about the PAR rating of the bulb cause that's what makes the plant grow...if a bulb produces 100,000 lumens but only 10k lumens are in the right spectrum it's still not as good as a 50,000 lumen bulb with 20k lumens in the right spectrum or PAR...

I'd go with floro for veg and hps for flower the size and type of bulb you get depends on the type of grow you are gonna have...sativa/indica take different light levels too sativa like much more and hotter temps generally
alwayssleepdeprived Reviewed by alwayssleepdeprived on . Are these lights any good??? We r preparing to put in 20 seeds and want to start and veg. under c.f.l.'s and see the results. We found these lights and wanted to know how you all felt about them and if they would be worth getting and using. ??? eBay: 4 / 75W Hydroponics Grow Clone Light T5 , lite 2700k (item 190073690688 end time Jan-24-07 20:27:30 PST) eBay: 4 PACK PHILIPS 100 WATT COMPACT FLUORESCENT LIGHT BULBS (item 110080863677 end time Jan-25-07 06:40:51 PST) Thanks for EVERYTHING everyone.... Rating: 5