I use an infrared bulb, no higher than 50 watts. You use a 60 watt but if your house is warm you may need only 50w. Easy to keep the cage warm and like being able to see my frog even at night with the red light it produces, without her being any the wiser (frogs can't see infrared/red light, y'know).

Heating pads (the adhesive mats I presume), if used, should only be stuck to the SIDE (either the long wall or side wall I guess it doesn't matter). I've personally never had much success with this method so I've always stuck with lamps. Just make sure said lamp has a dimmer on it (or you could order a dimmer cord) so you can adjust the temperature as needed; infrared bulbs get pretty dang warm with when not turned on full power.

Hope that helped.