Metal Halide Lamp (MH)

Last Updated: August 8, 2018

Definition - What does Metal Halide Lamp (MH) mean?

Metal halide (MH) lamps are a type of high-intensity discharge (HID) lamp. Metal halide lamps produce light though an electric arc and a mixture of gaseous mercury and metal halides. Metal halide lamps improve the color rendition and efficiency of light, with a luminous efficiency of 75 – 100 lumens per watt, and have a lamp life of 6,000 – 15,000 hours.

Metal halide lamps emit a bluish-white light that encourages plants to enter a vegetative growth stage. When used properly, plants will grow thick and stocky foliage.

A metal halide lamp is also known as a metal halide light.

MaximumYield explains Metal Halide Lamp (MH)

Metal halide lamps are popular for indoor gardening. They are a cheaper alternative to other types of indoor grow lights while still producing a high quality and high output light. These lights are often employed by gardeners when they want to keep their plants in a short and bushy state.

One downside to metal halide lights is that they do not emit in the red/orange portion of the light spectrum, which is necessary for plants to produce fruit. However, special metal halide lamps with an enhanced red-light spectrum have been developed.

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