I got a 60 watt red light bulb from from www.reptilesupply.com and it's always on 24/7. My bp doesn't mind, but it's starting to get annoying. At first it was cool, but the visibility isn't that great. I think moonlights might go a bit easier on the eye and if you can you should get 2 lamps: 1 regular light bulb and another moonlight. Have them on a timer so that the regular one is on during the day and moonlight is on at night. This way you get more light during the day and get to enjoy the vivarium a bit more I'm speaking from personal experience tho. Yesterday I was making a video and I had to use night framing on my camera to be able to see anything with even with the red light on.