Depends on the night-time temps in the box, and his age. If his wing feathers have not emerged, then he is probably only a week or less old. He will need 95*-100* heat at night when the temp drops. If he has some wing feathers, he is a week or older and will need a temp of 90*-95* at night. If he's in a box, where he can get away from the heat, he will regulate his own temp. You probably only need the light at night.
And make sure you feed him 28%-30% gamebird or turkey starter