Hello, I am in the process of finishing my fist orchid box. I got most of the gear sorted apart from heating/cooling of the box. The box is about 60"x30x30. The box is located in my basement which is always 18-21deg, basically lukewarm. How can I insure the day night temperature difference? Would heating work with heat mats (with enough air movement), or I need to drill my box and blow hot/cold air ? Also, did anybody try Peltier coolers/heaters ? Thanks for the help.