Lowryder will flower under 24/0 light so that is what you would want to give them for ideal production. Warm whites will be fine the whole way through too man, I've used both for veg before, and there isn't really that big of a difference. What is important is keeping the CFL 1-2" away from the plant. Anything farther than that and you're wasting precious lumens. The proximity to the plant is much more important than the spectrum for that part.