Genetics play a HUGE part in how dense the buds turn out. Some strains perform extremely well under floros, others just don't generally do well under any kind of indoor lighting. With bagseed, it's all about experimentation. Thin out the strains that don't turn out good and keep the ones that do and propegate them. I'm running 1000W HID lighting and will come across strains (like Northern Lights X Haze) that just don't do well indoors. When it comes down to it, there is no such thing as an indoor strain as ALL of it originated outdoors in the first place, but there are many strains out there that just work better outside.