CMH Bulbs

The ceramic discharge metal-halide (CDM) lamp, often referred to as Ceramic Metal Halide lamp (CMH) is a source of light that is a type of metal-halide lamp which is 10-20% more efficient than the traditional quartz metal halide and produces a superior color rendition of up to 96 CRI.

The ceramic metal halide is a variation of the metal-halide lamp which is itself a variation of the old (high-pressure) mercury-vapor lamp. A CMH uses ceramic instead of quartz like a traditional metal halide lamp. Ceramic arc tubes allow higher arc tube temperatures, which some manufacturers claim results in better efficacy, color rendering, and color stability.

The discharge is contained in a ceramic tube, usually made of sintered alumina, similar to what has been used in the high pressure sodium lamp. During operation, the temperature of this ceramic tube can exceed 1200 kelvins. The ceramic tube is filled with mercury, argon and metal-halide salts. Because of the high wall temperature, the metal halide salts are partly vaporized. Inside the hot plasma, these salts are dissociated into metallic atoms and iodine. The metallic atoms are the main source of light in these lamps, creating a bluish light that is close to daylight.

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Filters
Product Filters
Brand
Weight Limit
Wattage
Voltage
System Type
Style
Speed Control Compatible
Spectrum Type
Fitting Size
Flange Size
Reflector Size
Size
Socket Type
Shape
Reversible
Reflector Type
Probe Type
Portability
Planting Sites
Output Control
Outlets
Number of Lamps
Module Capacity
Material
Light Type
Light Source
Lamp Drive Frequency
HID Type
HID Bulb Type
Fitting Type
Component Type
Chip Type
Base Type
Ballast Component Type
Application Type
Application Type
Growing Method
GPH
Fixture Configuration
Fan CFM
Configuration
Color Temp. (Kelvin)
CFM
Bulb Length
Built-In Socket

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