Hi thanks for being so thorough with your description, that helps a lot!
Firstly, the red bulb should go and you shouldn't leave any type of light on 24/7. He needs darkness at night to sleep. He very well could be stressed out because of the light at night disrupting his sleep.
Dragons have an extra cone in their eyes compared to humans. This allows them to see much more of the light spectrum then we can. So just imagine, if you can see the light, your dragon most definitely can and most likely in a much stronger and vivid manner.
So no lights at night.
You only need to have supplemental heat at night if your house gets below 60 degrees. Otherwise your good to go with no heat neccessary. And if you do need it, your che will be fine.
Those dial thermometers are wildly inaccurate. plus they dont tell you the most important temperature, your basking surface. I strongly suggest you pick up a digital with probe end. Luckily they are really cheap nowadays. You can usually find them for 10 bucks or less at every petstore.
Once you get that, you can measure your temps and see what they are.
You want a bright white basking bulb. You can use a regular household bulb, or a reptile basking bulb. The key is that is gives you the temperature you need. A lot of us use regular household incandescent bulbs. And you probably wont need anything over 100w. I use 55w bulbs in my tanks. But, you wont know until you get an accurate way to measure your temps.
As for your reptisun, it would be beneficial to upgrade to the 10.0 instead of the 5. The 5 puts out less uvb as it's designed mainly for tropical creatures while the 10.0 is designed with desert creatures in mind.
What do you mean by the 6-6?
For your lighting you should have your basking bulb, and your reptisun, and they should be on for 12-15 hours a day. A timer helps with this. And then complete darkness at night.
Once you make these changes you should see a big improvement with your little guy!
-Brandon