High Intensity Discharge (HID)

Definition - What does High Intensity Discharge (HID) mean?

High intensity discharge, or HID, lighting is useful for indoor growing situations where cannabis is being grown inside a grow room and the grower needs to ensure adequate light. HID lighting ranges in type, and can also range in the color of the light created.

Although many other types of lighting are suitable for growing marijuana, HID lighting is one of the first types that were used for indoor growing, and remain popular to this day. They are available in both high pressure sodium (HPS) and metal halide (MH) versions.

The latest development in HID lighting includes double-ended lighting systems as opposed to single-ended traditional bulbs. Growers are also experimenting with cermaic metal halides (CMH), and digital ballasts have also improved the performance of these lights temendously.

Hydrolife explains High Intensity Discharge (HID)

Light is a crucial consideration when growing any type of plant, including cannabis. In a natural, outdoor setting, all the light needed is provided by the sun. However, in an indoor growing situation, artificial lighting must be used. There are many different options available, but high intensity discharge lighting, or HID lights, have become very popular for a number of reasons.

One reason for the rise in popularity of high intensity discharge lighting is the fact that it is available in different colors. This goes deeper than merely coloring the outside of the bulb. Different gases can create different wavelengths of light when heated, and these color differences will affect plants in a variety of ways.

For instance, high pressure sodium HIDs create reddish light, or light with a slightly orange tint. This is best used during the flowering phase of plant development. On the other hand, metal halide HIDs create more light in the blue spectrum. This cooler light is better suited for plants in the vegetative stage of development. With that being said, many manufacturers recommend using both metal halide (MH) and high pressure sodium (HPS) lights at the same time.

When choosing HID lighting, you’ll need to create your set-up to match your space. A single 1,000-watt bulb will cover about five feet by five feet. A 600-watt bulb will illuminate about four feet by four feet, while a 400-watt bulb will light up an area that’s a little larger than three feet by three feet. To improve effectiveness, HID grow lights should be used with reflectors. Light movers and timers are also beneficial in larger commercial grow rooms.

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