yeah, if they get 'enough' light they take a break even during the day. Try raising lights.
water when top 1" is dry.. thoroughly with at least some runoff. it could be wilt, too, but that would obviously perk up immediately after any irrigation -- doubt it, but mentioning it for fun. 22-27 C is fine. Maybe you see a bit of leaf cupping to conserve moisture at 27? but would be minor and can handle more.. generally 30C and higher you start to worry more.