T-12 fluoro tubes (5000-6500k) are OK for the first 3 weeks...IMO.

after that...you need a lot more light...T-5's & T-8's require a different special fixture...(and T-5's are $$$$)

Most peeps add CFLs...many as possible...but, HID is the way to go...:thumbsup:
Dutch Pimp Reviewed by Dutch Pimp on . fluorescent and lumens first grow I moved my grow room under my basement stairs. I have a 4 fluorescent ballast mounted on the ceiling in a 4x6 wide and 5 1/2 feet tall room. I have 2 plants on a stool chair two inchs away from the lights. I think they are good with light. one plant has wide leaves may be indica and the other has sharp narrow leaves maybe sativa but they both only have 4 leaves. They are only 1 1/2 inch tall so no tall stems and they are only 5 days above ground. my question is I have 2 lights f40sp65 with 40w Rating: 5