You can use the blue spectrum to flower but your yield will be pathetic. Get some bulbs between 2000-3000k. If you're on a tight budget I recommend getting this bulb. Remove the spaces from the link where you find them. Happy growing!
Hey lyrical check this thread out b4 u make any quick decissions on lighting. U can use that 65k and easily veg out ur plants to about a foot tall. I reccomend cfls in stealthy grows when hieght requirements have to be met.
But when it comes to flowering its a whole other world heres the link, check 4 urself.
Hope this helps.
you don't need the soft white spectrum for flowering, it's a little better but the difference is small. people flower with metal halide lights which are daylight blue spectrum with very respectable quality and quantity buds.
now the difference between fluoro and HID is definitely substantial.
I grow with cfls and use the 6500k for vegging and 2700k for flowering . My yeild isnt quite as much as when I was using my HPS but I still get some really nice buds .