I would ditch the lamp in place of a UTH. The lamp can cause humidity issues by drying out the air. Plus its thought that belly heat is better for corns (though this is debatable). Get a UTH and a rheostat to control the temp and you'll be good to go. Get an accurite thermometer like others have said and place the probe in the cage on top of where the UTH is and adjust the rheostat to get the temps ~82. You'll be all set!
Other than that his set up looks great!