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Differences and Identification of HID bulbs

Mercury Vapor

Has a resistor in the bottom of the electrode

Find Mercury Vapor Bulbs

High Pressure Sodium

Produces a yellow light ~2700K
Thin straw like tube in the middle of the lamp

Find High Pressure Sodium Bulbs

Metal Halide

Bright white light ~3700K
Round bulb in the middle of the lamp

Find Metal Halide Bulbs

Pulse Start Metal Halide

Made for small form factors

Find Pulse Start Metal Halide Bulbs

Learn More

For more information about HID bulbs, see our article on Lighting Technologies