Philips Quartz metal halide lamps with clear outer bulb. 2000 Watt 4200K Cool White lamp with 12,000 hours average lamp life. Unique 3-band technology resulting in high luminous efficacy, both initially and over long lifetime. High safety and comfort level maintained over life. Used for Sports lighting, floodlighting of buildings and monuments, area lighting e.g. harbours and building sites. HPI-T lamps require a protective front glass.