I have a compressor, but it's not suitable for spraying any volume of anything. No tank, no moisture trap. It's good for pumping up pool toys and tires, and that's about it.
Anyway, like I said, I'm not interested in spraying anything else in particular. I don't, as a rule, like spraying. Seriously. The problem with spraying is all the damn cleanup. I'd need to be looking at something a lot bigger than my shop to make it worth considering.
Be that as it may, that doesn't change the fact that your original point about bright, sunny days is completely irrelevant. :) My shop is like a cave, rain or shine, day or night, it's always dark without a little help from 'lectricity.
Which is particularly obvious if I screw up and leave the heat running while operating the table saw and shop vac and trip the breaker. That's always fun.
Mine is basically a dead-end street too, but there's a, well, there's a reason for all the traffic. I'm not going to get into details about exactly where the shop is because I don't want to give someone a roadmap.
He knows I can't afford it, but he wants me to use it anyway. Actually, for that matter, I'm really not all that inclined to paint it white anyway. I hate white. Just in terms of feeling cozy and inviting and stuff, I think the raw, well-aged jummywood look actually works for me. That's probably the real reason why I've never bothered to paint out there. The idea of covering all the wood in white doesn't make my heart flutter at all.
In fact... Well. Hrm... That's interesting. I had a play with the GIMP, colorizing everything wooden a white color. I didn't make the selection accurately enough to be a true representation of what it would look like, but it's pretty close. It actually looks more OK than I would have thought.