Yea if it wasn't for LED I probably never would of moved inside. There's less equipment to worry about (ballast, hood, new bulbs), they produce a lot less heat, they consume less electricity, they last longer, since they only emit usuable light they are more efficient, and if my hangers fail I don't have to worry about my house burning down, so they are safer.
As far as yield goes I don't really care about that, I'm more interested in potency. I'd rather have an ounce of top shelf buds rather than 2 ounces of some mids. People usually say they yield less but the bud is frostier, I don't really mind sacrificing some of the weight for a higher potency, but that's just me.