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How to Choose your HID Bulb

HOW TO CHOOSE YOUR HID BULBClick to view bigger version

Lamp Selection - Factors to Consider
  • CRI is a lamps ability to render an objects true color based on a scale of 100, with a 100 being a incandescent lamp. 
  • Mercury Vapor has a CRI of 22-55, Color Temp between 3000-5900K, and light emitted has a bluish-green hue. 
  • Metal halide has a CRI of 65-93, Color Temp between 2900-6000K, and is best the best white light of all HID light sources. 
  • High Pressure Sodium has a CRI of 20-30, Color Temp between 1800-2600K, and gives off a light ranging from an orange hue to a pink hue. 
  • Burning position is a position in which a lamp is designed to operate for maximum performance & safety. 
  • BD - Base Down (bulb is vertically positioned with the metal base at the bottom, glass up)
  • BU - Base Up (bulb is vertically positioned with the metal base at the top, glass hanging down)
  • HBU - Base Up +/- 90° (bulb can be operated in a base up or horizontal position)
  • HOR - Horizontal Burn (bulb is positioned with the metal base parallel to the ground)
  • U - Universal Burn (bulb can be operated in any position)
  • Open Vs. Enclosed Fixture Lamps 
  • Open fixture lamps include a glass envelope to protect in the case breakage under high pressures.
  • In an enclosed fixture lamp, a fixture lens takes place of a glass envelope in an event of breakage.

Probe Vs. Pulse Start

Probe start technology uses an ignitor inside the lamp to start the lamp. 
 A pulse start system adds a separate ignitor component that is pared with the ballast rather than inside the lamp. These system changes allow a Pulse start system to provide improved efficiency and performance.

Common benefits of pulse start equipment include:
– Greater efficacy & energy savings
– Superior color rendition
– Quicker restrike
– Improved lumen maintenance
– Reduced color shift over life
– Colder starting temperatures
– Longer lamp life
– Faster warm-up

  • HID bases are designed by a letter and a number. The number is the diameter of the base by eights of an inch. 
  • The MOL or Maximum Overall Length is measured in inches. 
  • Make sure you check the compatibility of the ballast with your HID lamps.
  • Mercury lamps are compatible with mercury ballasts and metal halide, but not high pressure sodium.
  • Metal Halide lamps are only compatible with Metal Halide ballasts. 
  • High Pressure Sodium lamps are only compatible with High Pressure Sodium ballasts.

How to interrupt a HID ordering code MH150/U/MED
MH) Type of HID Metal Halide 150) Watts U)Burn Position Universal MED) Base Medium
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