Hey, Veiled.
You can use a Heat lamp or a UTH(Under Tank Heater_, or even both. If you decide to use both then you should use a lower wattage bulb, like a 25 Watt. If you decide to use a Heat Lamp on it's own, then a 60-75 Watt bulb will do, depending on the over all room temperature. Paper Towel is a great substrate for Leopard Geckos. A humid hide is easily made with a Rubbermaid® Food Container-- Just cut a hole in the side that is about 2" X 2" and fill it with either moist papertowel or moist moss(The kind you get at the pet store). Take care. 
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-Britney
Atlantic Reptiles(In the works)
2.4.1 Leopard Geckos: Ron, Raine, Dream, Tango and Go-Go(Other two are unnamed).
0.0.1 Lined Snake: Monty
0.0.1 Bearded Dragon: No name yet, lol.