Perfect for use in horizontal facing light hoods (like Zoo Med's Economy, Combination and Deluxe Reptile Hoods.True blue glass (not painted or coated) for better heat transfer.Full spectrum daylight bulb for heating reptile or amphibian terrariums.Provides UVA, the wavelength that promotes a psychological well being and stimulates normal feeding behaviors in reptiles.Can be used with Zoo Med's ReptiSun 5.0 fluorescent lamp for proper UVB exposure.European quality for long burn life.