These halogen cycle lamps may shatter if scratched or damaged. Use these lamps in fixtures designed for their high operating temperature. Always turn power off when changing these lamps. For satisfactory performance limit the seal and wire lead temperature to 350C to avoid deterioration. Maintain a minimum lamp wall temperature of 250C to assure the halogen cycle occurs. Remove all grease and fingerprints from these lamps before operation. Never exceed the design voltage of these lamps.