I heard therapy light boxes for SAD can trigger mania.

They let me use one briefly in my last inpatient stay about a month ago, and I felt like a god standing naked in front of that thing.
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Yes, I did successfully trigger my own episode of sorts last year. I'm no longer diagnosed bipolar, but it's possible I could be determined to have some ultra rapid form of it, or I might have schizoaffective, borderline, or even adhd. What I did is I became obsessed with writing--it started with trying to figure out this disorder through thought experiments, just imagining what might be going on in the brain, then I went on to other things. Slowly, I started thinking I had some great insights and it all just snowballed from there. Suddenly logically trying to understand bipolar disorder became intuitively understanding the universe, then the thoughts of being a prophet came, then I had to save the human race, and as I was developing powers, the illusions of this reality were crumbling and I could see clearly the true nature of everything. The funny thing is that I had to convince myself this was logical in order to even get my feet wet with it. I suppose that's from being an INTJ personality. In short, I just started obsessing, thought it was a good idea (not sure if that was my choice, or the illness telling me it was), and it blew up.

I never crashed. This was over a year ago and I simply made it back to earth as if I gracefully floated back down. I guess I'm mostly manic, rarely get depression, but I do get intense "manic sadness" and suicidal feelings, just with virtually no symptoms of depression. I didn't have much if any problems sleeping, and my preoccupation with the delusions were the strongest aspect of it, so that's why I think I have psychosis and not so much the acute mania that causes destructive behavior.