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High-Intensity Discharge Lamps
Because of the intense light they produce, HID lamps are commonly used outdoors or in large indoor areas. They are best-suited for areas where they stay on for hours at a time, since they can take up to 10 minutes to produce light when first turned on. They function extremely well as residential outdoor security lights.
Benefits of High-Intensity Discharge (HID) Lamps
HID lamps give off a bright white light similar to natural sunlight. HID lamps can help you see better and feel more secure at night since they illuminate more than halogen lamps.
What Are My Options?
Like fluorescent lamps, HID lamps require a ballast and will not work in regular fixtures. A ballast is a component used with HID bulbs that supplies the initial electricity needed to create the light, then regulates the amount of electricity flowing through the bulb so that the right amount of light is emitted. When you replace an incandescent lamp with an HID lamp, you can save 75-90% of lighting energy.
|
High-Intensity Discharge Lighting Type |
Efficacy (lumens/watt) |
Lifetime (hours) |
Color Rendition Index (CRI) |
Color Temperature (K) |
Indoors/ |
|
Metal Halide |
70-115 |
5000-20,000 |
70 (fair) |
3700 (cold) |
indoors |
|
High-Pressure Sodium |
50-140 |
16,000-24,000 |
25 (poor) |
2100 (warm) |
outdoors |
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References and Links
Why is this important?
High-intensity discharge (HID) lamps are the most efficient, longest lasting lamps available.





