I've been using a dhp for a few months now. I would normally use a che to bump the temps up during winter but saw the Arcadia dhp at PetSmart one day and decided to try it. While I do like it, I think it heats nicely once it breaks in, I have noticed zero difference in my dragons behavior. He basks, eats and everything else the same as when I used the che and when I use just the basking bulb during warmer months. He's always been pretty active so I'm not sure if that changes anything. I have it next to a halogen basking bulb, behind my t5.