Zoo Med's Daylight Blue Reptile Bulb is made of a true blue glass (not painted or coated) for better heat transfer. Economical daytime heat source provides beneficial UVA rays for the psychological health of the reptile and amphibian species. Bright, attractive light output accentuates your animals' natural colors for maximum viewing pleasure. European quality for long burn life. This is an offering for multi quantity bundle - 2 count