Your ball should be fine with the red light. I used to use a white one, but if I turned it off at night, it would be too cold for her, so I switched to red. So she knows it's daytime, I leave the rooms light on. She gets heat 24/7 this way (along with her UTH of course)

I also keep wet towels over her tank lid to keep the humidity up. I dampen them daily, more than once a day if she's shedding. It's worked pretty well for us.