Okay, so this is my mirabilis x bicalcarata. I've had it for about 4.5 to 5 weeks. When I left for my vacation, I'd had it for about two weeks, and it was totally green. I returned from my two week vacation, and it was really red, and has stayed that way since. Each leaf feels perfectly normal where the red is, there are no abnormalities on the undersides of the leaves. It just pitchered, and has three tendrils that are beginning to inflate, so growth seems fine.
I grow it in a terrarium with 65-70% humidity during the day, and about 80% at night. It is under at least 30 watts of fluorescent lighting. One warm bulb and one cool whitish bulb.
In short, what's happening to my plant?