jayc, if the room temp doesn't drop below 65 at night, then you won't need any artificial heating. You can use a CHE during the day, but they do better with a bright white basking light. Sometimes a low wattage CHE is used alongside a basking bulb to help raise the temps a little. For a basking area, you want temps of about 100 to 110 but no higher because it could cause dehydration. Babies tend to like the 110 temp and adults seem to prefer the cooler ones at 95 to about 105. You also have to make sure that you are using either a temperature gun or a digital thermometer with a long wire & probe end as those are the only 2 ways to get an accurate reading.
You could use a heating pad on the side of the tank if needed, but they aren't recommended on the bottom of the tank as they can overheat and your beardie could get burned. They test heat by the 3rd eye on top of their heads, so you have to be very careful when using something underneath them even if a substrate is over top of the heatpad. Hopefully your question was answered. :wink: