For indoors I prefer photos. Power is expensive here so 2 months at 12/12 with a bigger yield is cheaper that 2 months of 18/6 or more.
I have 9 autos outside this year as I'm way up in northern Bumf**k Alberta and photos don't have time to finish before the snow flies. If I grow them inside it will mainly be for breeding to get more seeds to grow outside again.