I'm new at this, but I have both. Under his hider rock, I have a heat strip. This warms about half of his hider area. I didn't have a heat lamp at first, but my house is so cool (around 68-70 degrees) that he never came out. I put a heater lamp in the other corner, directed onto a basking rock, and I keep it on during the day. I turn it off at night so that he gets normal diurnal rhthym, and I noticed that he is now coming out more. I think he prefers the warmer temperature. Having the heat strip under only part of his hider rock, gives him a choice between having it warm or cool, or somewhere in between. So far it seems to be doing the trick.