He doesn't need the UVB light.

Cover 3/4 of the screen top with saran wrap/plastic wrap to hold heat and humidity in.

Cover 3 sides of the tank with some kind of natural background so the frog feels secure and not exposed.

Keep the temps from 78° to 80°.

Humidity must be 70% to 80%. Hygrometers are not expensive most of the time. Buy digital temp and humidity gauges. They are more accurate.