I turn my chams basking light off first. It begins to cool the cage down and also signals him that it's time to find a sleeping place.
Then a 1/2 hour later, I turn off his UVB.
By that time, he has chosen his place and is settled in ready for nighty-night.
1.0 Ambanja, 2.1 Firebelly Toads, 3.1 Canaries, 4.4 Koi, 1.0 Sheltie, 1.1 Cats