How r u doing guys?

I have a temperature problem with my cage,,

At the day time, the temp is perfect, the cold side about 80 and the hot side with the UTH about 91.. I use the UTH and a Lamp,,

but at night I close the lamp and keep the UTH on.. the temp on the cold side went to 76.. and the hot side stays at 88..

I noticed that my snake when i turn of the lamp at night he switch to the hot side,, but when I wake-up in the morning I find him on the cold side,, and the cold side is about 76,,

should I use a night lamp? or he just like to stay in a cold place?

iam afraid that the temp is low for him, but why he just stays in the hot side ?

thanks guys,,