Confused

In the day time the temps are around 88-90 hotspot but then at night it's like 91-92 at night I thought nighttime was meant to be cooler lol the thermostat is always the same I don't change it of anything I lower the thermostat maybe a fraction at night I know drops at night are not needed, but Ye just confused lol :)

what are the temperatures in the room? (day/night)

With a thermostat things should stay about the same... the swing you described is perfectly ok, but is interesting.

Not sure about the temps in my room, I've order a temp gun so I'll start using that for other temps I only have a thermometer and hydro for inside the balls cage, but at night I think I produce alot of heat cause I'm always hot in head bed so maybe that's the reason lol

I've noticed this in rooms with larger temp swings, too, when using an on/off thermostat. My theory is that the UTH has to work harder when the thermostat kicks back on, due to the cold ambient temps outside the cage, which then heats the glass above it a little higher before the thermostat kicks back off.