me to
but to answer your question, you should use a mix unless you want to buy twice as many bulbs and switch them when you begin to flower
in short 6500K for Veg and 2700K for flowering, but mix em up, some 5000K is also useful (some even use all 5000K from start to finish)
but IMO you should do some research before you use so many money on bulbs/power, and not just ask in here and take the fist person word for it..
all we try to do indoors, as we for one reason or another cant grow out doors is to "copy" nature
Sun stand high in the sky at spring, in a angle that let most "blue" light in ("6500K") plants have adapted over thousand of years and will use mostly the high blue colors in Veg. once in flowering the summer is at the end and fall have started so the sun stand low in the sky and let mostly red/yellowish light in, agin plant have adapted and use the red/yellow light ("2700K") to grow its flowers/Buds
so mix em up and use mostly 6500K early on and switch a bunch of em to more 2700K once in flowering (maybe in a 1-3 ratio and switch that around to 3-1) if you dont want to switch anything around, use 2x 2700K per one 6500K all grow, but dont expect low bushy plant`s with close nod space then, use a net in a scorg, also very useful for fluorescent light, if you did your research you would know to keep em close to the plant`s (2-4 inch`s according to my light meter measuring my T5HO 49W) so some sort of training is requiter for a decent result