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Uses
Metal halide lamps are used both for general industrial purposes, and for very specific applications which require specific UV or blue-frequency light. They are used for indoor growing applications, because they can provide the spectrum and temperature of light which encourage general plant growth. They are most often used in athletic facilities. Metal Halide lights are quite popular with reef aquarists, who need a high intensity light source for their corals. Another widespread use for such lamps is in higher end professional lighting fixtures, especially intelligent lighting.
Operation
Like other gas-discharge lamps such as the very-similar mercury-vapor lamps, metal halide lamps produce light by passing an electric arc through a mixture of gases. In a metal halide lamp, the compact arc tube contains a high-pressure mixture of argon, mercury, and a variety of metal halides. The mixture of halides will affect the nature of light produced, influencing the correlated color temperature and intensity (making the light bluer, or redder, for example). The argon gas in the lamp is easily ionized, and facilitates striking the arc across the two electrodes when voltage is first applied to the lamp. The heat generated by the arc then vaporizes the mercury and metal halides, which produce light as the temperature and pressure increases. Common operating conditions inside the arc tube are 70-90 PSI (480-620 kPa) and 2000 °F (1090 °C).
Like all other gas discharge lamps, metal halide lamps require auxiliary equipment to provide proper starting and operating voltages and regulate the current flow in the lamp.
About 24% of the energy used by metal halide lamps produces light (65-115 lm/W[1]), making them generally more efficient than fluorescent lamps, and substantially more efficient than incandescent bulbs.
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PROLUME 50 Watt 4000K Metal Halide Lamp, Medium Base Clear
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PROLUME 50 Watt 3000K Metal Halide Lamp, Medium Base Clear PROTECTED
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PROLUME 70 Watt 4000K Metal Halide Lamp, Medium Base Clear
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PROLUME 70 Watt 3000K Metal Halide Lamp, Medium Base Coated
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PROLUME 70 Watt 3200K Metal Halide Lamp, Medium Base Clear PROTECTED
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PROLUME 100 Watt 4000K Metal Halide Lamp, Medium Base Clear
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PROLUME 100 Watt 3900K Metal Halide Lamp, Medium Base Coated
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PROLUME 100 Watt 3200K Metal Halide Lamp, Medium Base Clear PROTECTED
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PROLUME 150 Watt 4000K Metal Halide Lamp, Medium Base Clear
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PROLUME 150 Watt 4000K Metal Halide Lamp, Medium Base Coated
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