Readers ask: What is in a metal halide lamp?
A metal halide bulb consists of an outer glass bulb and an inner arc tube, typically made of fused quartz to withstand the high temperatures created by the bulbs. The inner tube contains metals, often mercury, gases such as argon or other inert mixtures, and halides.
Do metal halide bulbs contain mercury?
All commonly available fluorescent tubes and high-intensity discharge (HID) lamps contain mercury. The most common HID lamps are mercury vapor, metal halide, and high-pressure sodium lamps. Lamps manufactured after 1994 contain less mercury—an average of a little less than 23 milligrams of mercury per 4-foot-long lamp.
Which rod is used in metal halide lamp?
The lamp has a optimum combination of metal halides made of rare earth metals. It has a quartz discharge tube with rod-shaped electrodes made of tungsten and a power supply of high voltage DC.
Are metal halide lamps hazardous waste?
lamps being recycled. The ruling includes fluorescent, high-intensity discharge, neon, mercury vapor, high-pressure sodium, and metal halide lamps. The universal waste category applies to several common, widely dispersed hazardous wastes, including pesticides, batteries, thermostats, and now lamps.
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Types. Many light bulbs on the market contain elemental mercury. All HID (high-intensity discharge) light bulbs including metal halide and high-pressure sodium light bulbs contain certain levels of mercury. 250-watt metal halide and high-pressure sodium light bulbs contain 38 mg and 15 mg of mercury respectively.
How much mercury is in a metal halide lamp?
According to NEMA, about one-third of these lamps sold in the U.S. contain greater than 100 to 1,000 mg of mercury. Metal Halide Lamp; Photo Source: Northeast Lamp Recycling, Inc. Ceramic metal halide lamps (CMH) provide a high quality, energy efficient, alternative to incandescent and halogen light sources.
What is metallic halide?
Metal halides are compounds between metals and halogens. Some, such as sodium chloride are ionic, while others are covalently bonded. Covalently bonded metal halides may be discrete molecules, such as uranium hexafluoride, or they may form polymeric structures, such as palladium chloride.
What is a halide bulb?
A metal-halide lamp is an electrical lamp that produces light by an electric arc through a gaseous mixture of vaporized mercury and metal halides (compounds of metals with bromine or iodine). It is a type of high-intensity discharge (HID) gas discharge lamp.
Can you put a metal halide bulb in a regular light fixture?
Like fluorescent lights, metal halides require a ballast to provide high starting voltages and to regulate current inside the bulb during operation. This is why a metal halide bulb will not work in a standard household lighting fixture — aside from the fact that the larger E39 base will not fit.
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A metal halide bulb consists of an outer glass bulb and an inner arc tube, typically made of fused quartz to withstand the high temperatures created by the bulbs. The inner tube contains metals, often mercury, gases such as argon or other inert mixtures, and halides.
Do metal halide lamps need a ballast?
Metal halide (MH) ballasts are required to start the lamp, regulate the lamp starting and lamp operating currents, and provide appropriate sustaining supply voltage. MH lamp voltage typically increases over time, and the ballast must continue to provide sufficient voltage to the lamp as it ages.
How do I identify a metal halide lamp?
Designation of MH lamps that follow the ANSI system starts with “M” followed by a number (an “H” designation stands for mercury vapor lamps, and “S” for sodium lamps), which identifies the lamp’s electrical characteristics and, consequently, the appropriate ballast.
How do you dispose of metal halide lamps?
Take lamps and tubes to a household hazardous waste collection center or event. Find where to recycle or dispose fluorescent lamps and tubes at Where Can I Recycle My?, or Earth 911, or call 800 CLEAN-UP (253-2687). Enter your zip code to find the nearest recycling center.
What light bulbs are hazardous?
Light Bulbs that are Hazardous Waste:
- Compact Fluorescent (CFLs)
- High Intensity Discharge (HID)
- Light Emitting Diode (LED)
- Incandescent (including those made with argon, krypton, and xenon gases)
- Halogen.
Are HID lamps hazardous waste?
Mercury-containing fluorescent and high-intensity discharge (HID) lamps and PCB-containing ballasts are two types of potentially hazardous waste. All fluorescent and HID lamps have mercury content.
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