Do you have a thermostat to control the temp of the UTH? That is the #1 thing you really, really need.

Also, how are you measuring temps and humidity. I've read a few things about getting a false read from certain hygrometers. Maybe you just have a bunk one?

Also, the UTH will do you no good at all of your substrate is too thick. I don't use ecoearth, but with the cypress mulch I use a 1/2 inch or less.

I don't think they really need the lights for a photo cycle at all. I've always heard that if they are in a room with a window, that's sufficient...but someone with more experience may want to chime in on that. I would use a CHE over any light bulbs if I needed to pump up the ambient temp.

Hope that helps! If I've missed anything I'm sure someone can follow up!