I have an abs plastics enclosure that has heat cable (finally got that to stick) and a 15w tube black light in it. I have even taped a dome light to the back to they to boost temps. My probe which is laying on the bottom of the enclosure says 98 but my temp gun pointing on the aspen says 85 on the hot end and 76 on the cool. How can I boost ambient temps in an enclosure like this. I was thinking of sticking an uth pad on top on the outside of the enclosure?