Lets go over the setup first, its never good to immediately jump straight to burmation as it could be life threatening to do so if it isn't.
Is it a compact/coil bulb, a tube light or a MVB?
What type of UVB does he have? (t5 14%, t5 12%, t5 10.0, t5 5.0, t8 10.0, t8 5.0, ec)
What brand is it?
How old is it?
Is it mounted inside or outside?
Is there anything blocking the UVB other than mesh if mounted outside? (plastic casing ect)
What is is basking temp, warm side temp, cool side temp?
How are you monitoring those temps, digital temp gauge, temp gun ect?
I recommend keeping the heat and uvb on, even if it is burmation just keep a normal 12-14 hour schedule. I'd say 12 if burmating, once it warms up/becomes summer i'd bump that up to 13-14 hours of light per day.
You'll want to remove that substrate, I cant exactly tell if its gravel or not but if it is that is a very huge impaction risk that can be fatal if untreated. Any particle substrate poses a big risk of impaction, calci-sand/vita sand being the most dangerous, ground walnut coming close to it as its very sharp and usually cuts up the insides of the animal when ingested. For the calci-sand/vita sand it actually turns to concrete in the stomach.
I'd put paper towels in there for now, especially in the hide to have something the beardie to dig at before going to sleep. You can also use tile, non adhesive shelf liner or news paper.
