 HPL lamps are also available in longer life versions that reduce the color temperature from 3250 K to 3050 K to give the lamp a life of around 1500–2000 hours as opposed to the 300-400 hour life of the standard HPL.ETC also manufactures a high-intensity discharge (HID) Source Four body with a metal-halide lamp.The fixture has a small box attached to the yoke of the fixture which contains the ballast and other additional control gear required to strike and operate an HID lamp.