Starting threads in the General Marijuana Growing section to ask this question shows that you have not done your homework and it demonstrates your lack of competence. If you began growing cannabis plants before knowing what light spectrum to flower in then you're a moron. Get off RIU and read an introduction to cannabis guide.I am using standard t5s right now
Light spectrum? Color temp. 2700k.best light spec 4 flower......red.2700 Kelvin