The 5005 Up and Accent Fixture comes factory installed with Vista's new MR-16 LED lamp. Boasting the energy savings of LED technology and the flexibility and performance of MR-16 Halogen lamps, Vista's new MR-16 LED lamps come in your choice of 4.5W (equivalent to 20W halogen) or 5.5W (equivalent to 35W halogen) factory-installed. Available in 15, 25, 36 and 60 degree beam spread options. This low voltage Up and Accent fixture is constructed of die-cast, copper-free aluminum for strength and reliability. The housing is equipped with an oversized silicone O-ring to protect against moisture and dust intrusion. At the base of the housing is a high temperature silicone diaphragm gasket which incorporates an innovative air valve that prevents a vacuum from forming within the fixture during dramatic temperature changes. A clear, tempered, shock and heat-resistant, soda-lime glass lens safeguards the lamp and optics.