The D3 UV Basking lamp is a high performance lamp providing UVB, UVA visible light and heat from a single lamp. Designed as a basking lamp for larger vivaria in which the reptile has sufficient room to move into and out of the basking area to regulate its temperature. 50 degree beam angle for wide basking area. Average life 6,000 hours. No external ballast required. 1 year guarantee. Important for the health and development of reptiles. Helps to synthesize vitamin D3. Helps prevent Metabolic Bone Disease. Stimulates breeding.