Dude your farther S. than me what are ya doin under lights...?
Several reasons for that. I live in an apartment with no balcony whatsoever, and putting them right outside my front door is gonna be impossible due to the fact there is virtually no room in front of it on account of the hallway to other apartments in my building. That also leads into there being no shortage of kids in my apartment complex who love to run around & play around outside (read: run about at full speed & horse around with no regard for people's potted plants, many of which have been knocked over & destroyed despite the many and varied protests from people to keep the kids in line and not destroy said potted plants), not to mention the way my windows are configured, all three are east-facing, and I would have to completely move my furniture around in order to accomadate my plants. My apartment complex also heavily frowns upon the growing of anything except flowering plants outside, and even then, there are rescrictions. So anything that bears fruit of any description, anything non-native, etc., strictly speaking, is a no-no. As long as we keep the plants inside, though, they tend not to ask too many questions.
So yeah, figured it'd be cheaper & easier to use grow lights. Just following my grandpa's rule #18: Work smarter, not harder. Were I living in a house right now instead of an apartment, none of these would even be a consideration, and I'd have more than one full-on greenhouse in the backyard, with plenty of room, sun, and windage for these guys