A 5.0 is safer than a 10.0 UVB bulb. The UVB bulb is one of the fluorescent tubes, right (just verifying)?
How cold does your house get at night? It's possible that the blue light could keep him awake. I don't use any light at night for my veiled because the temps in my house at night are around 70 degrees F. They can handle down to 65, and they like their temps to drop at night.
Also, I would suggest a dripper. You can find them for about $6 at most pet stores or you could make one out of a clean milk jug.
Edit: too slow again