15115S : 450W E39 Mercury Vapour Lamp, 4500K

Standard 450W E39 Mercury Vapour Lamp, 4500K. Sold Individually.
HID Mercury Vapour/Self-Ballasted/450W/R57/E39/4500K/130Deg/EYE

Mercury vapour lamps are mostly sold as replacements for existing installations. It is very rare to see new installations equipped with mercury vapour lamps. They can still be found in some manufacturing or industrial sites, utilities, roadway or parking, and landscape applications.

HID stands for High Intensity Discharge. These lamps produce light by means of heating a gas with an electric arc (as opposed to the incandescent lamp which produces light by electrically heating a solid wire). All HID light sources require auxiliary equipment (such as a ballast, capacitor, and/or ignitor) to provide the appropriate electrical values for starting and operating.