Grow Lights in hydroponics gardening – Metal Halide (MH) grow ...
Generating between 65 to 115 lumens of light per each watt of consumed electricity, metal halide grow light lamps are considered to have high efficiency. There are different sizes of metal halide lamps , starting from 70watts and finishing with 1500 watts. Though metal halide bulbs can be either transparent or coated with phosphorus, the first type is more preferred for the indoor gardening, since it produces very bright light. Regular metal halide bulbs should be replaced after about 18 months or 9500-10000 hours of use. Along with typical or regular MH bulbs, there are also Super Bulbs, which can produce up to 10-12% more light than ordinary bulbs. There are also many different styles of metal halide lamps available on the market today. Structurally, metal halide lamp is a vacuum glass tube. MH lights produce light, which is very close to the natural sunlight with the rich blue spectrum. Under the influence of electric current, those metals start to generate light and heat intensively. In order to make MH light to work, it is necessary to use a ballast, designed for a particular bulb size.