It depends. We've been to Earths - or planets, anyway - that have a yellow sun, but inmates' powers were still dampened. Sometimes they do it for wardens, too, and there's no way to know in advance, usually. I wouldn't swear off ports entirely, though, you can get pretty stir crazy just hanging around here without a break.

And you'd be surprised. The system does work, and sometimes the stuff we go through is pretty good at bringing up issues people otherwise might not talk about. [Also he's not 100% positive why you'd be an inmate in the first place, so. There's that.]