With a RHP you're basically saying "if you want to be warm, you have to come out". That probably encourage him to come out more, but he may also be more stressed if he didn't want to come out.
I'm currently offering both and under tank heater and a heat lamp that gives a basking site of about 90 degrees on a branch at the top of the cage. This way the snake can pick what it wants. If I wanted to encourage her to come out more often during the day what I'd probably do is GRADUALLY lower the thermostat on the under tank heater but not shut it off entirely. See what happens, but always give at least some heat so that if she really doesn't want to come out she's not forced into it.
The light isn't on a thermostat, it's just a low watt normal bulb with the temp controlled by the elevation and there's a thermometer probe taped to the branch so I can monitor it that way but of course the light doesn't move so it's pretty constant.