The Daylight and UV Parameters: Leap offers two types of lighting for use with your Leap habitats. LED white light that simulates visible sunlight and Fluorescent T5 UV (5% and 10%) fixtures and bulbs. White light is important for animals in creating a day and night cycle to promote a healthy circadian rhythm. It also incorporates light in the blue and red spectrum that plants use in photosynthesis. UV light is critical for reptiles and amphibians to synthesize Vitamin D3 which is critical for the metabolism of calcium.