Are there different kinds of HID lights?
A. Yes. The two types of HID lights available are METAL HALIDE and HIGH PRESSURE SODIUM. Metal Halide lamps come in 175, 250, 400, and 1000 watt sizes. High Pressure sodium systems come in 150, 250, 400 and 1000 watt sizes. Metal Halide lamps put out light that is high in the blue color spectrum. That is more like natural sunlight. In late 1994, 2 new metal halide lamps became available–the AGRO SUN Halides in 400 and 1000 watt sizes. These are halide bulbs designed specifically for agricultural use. They put out as much light as a “super output” halide, but they emit 15% more of the red/orange spectrum. This makes them even more like natural sunlight and an excellent all-around light choice. For growers who wish to experiment with color spectrum, halides can be a good choice. Each metal halide lamp kit–the 175, 250, 400 and 1000 watt systems–may be retrofitted with a CONVERSION BULB. This bulb works on a regular halide ballast, but emits sodium-type light. Because of this, the meta
