HID Bulbs: More Than Just a Bright Idea
Metal halide bulbs are particularly popular. With a lifespan of 15,000-20,000+ hours, (nearly 20X the lifespan of an incandescent bulb) and 65-115 lumens per watt the metal halide bulb is among the most efficient. What makes metal halide bulbs the most versatile of the HID bulbs is their 65-90 color rendering index (CRI) score, bringing the metal halide close to the 100 CRI rating of sunlight and close to ‘true’ color. High pressure sodium bulbs, for example, have a CRI score of 20-25, casting whatever the bulb illuminates in a yellow glow. This severely limits the applications of high pressure sodium bulbs. Because metal halides are close to a CRI of 100, they can be used in areas where accurate color is important like inside a kitchen or supermarket. For a bulb that can fill a large place with lots of light efficiently, the HID bulb is a great choice. The luminosity and true color also make the metal halide bulb a popular choice in film and photography where light and color must be rendered accurately. The different types of HID bulbs and the types of fixtures to which they are configured make it a versatile and economic option.
HIDs are versatile and efficient: use them in your kitchen, parking lot, movie set, or greenhouse and you will find that your lighting and energy needs are met.