Made of true blue glass for better heat transfer. Daylight bulb for heating reptile or amphibian terrariums. Provides beneficial UVA rays for your critters’ health. Accentuates the natural colors of your pets. European quality for a long burn life. The Zoo Med 150 W Daylight Blue Reptile Bulb can help to keep all of your critters cozy and comfy. This bright, naturalistic daylight bulb is designed for heating reptile and amphibian terrariums. It’s perfect for use in horizontal facing light hoods. The long-lasting bulb is made from true blue glass that isn’t painted or coated, so it delivers great heat transfer. It’s an economical daytime heat source that also provides UVA rays to promote your critters’ well-being.