Proper heating, lighting and humidifying, is vital for well-being of your iguana. Unfortunately, these conditions are too often overlooked, which leads to serious diseases and painful deaths for these poor reptiles. For example, a lot of people keep their iguanas with no UV light, they don’t think they need it, as long as they’re warm. That can cause a lot of different problems, and one of the biggest is metabolic bone disease, which is sad, but common, with iguanas and other reptiles. Irony is, that it can be completely avoided with a simple light.