Through research I have found that mercury vapor bulbs can be used in metal halide fixtures but a metal halide bulb cannot be used in a mercury vapor fixture. Co-worker says that’s hog wash and knows a number of electricians that use MH bulbs in a MV fixture with supposedly good results.
Metal halide lamps produce a bright white light and are highly efficient members of the HID family. The metal halide lamp is very similar in construction to the mercury vapor lamp. The major difference is that the metal halide lamp contains various metal halide additives in addition to mercury vapor.
Secondly, are metal halide lights dangerous? Normal use of Metal Halide lighting requires that they are very rarely, if ever shut off. The constant heat takes its toll on the glass of the inner and outer cone, causing them to deteriorate and possibly break. Another danger of these lamps is the possibility of the leakage of Ultraviolet Rays.
Moreover, how does a mercury vapor ballast work?
The mercury vapor lamp works by creating an electric current to mercury vapor within a sealed glass jacket. The bulb is comprised of an inner tube, called the arc tube, and an outer jacket (or bulb). Using too small of a ballast will result in lower light output and can shorten the life of the bulb.
Can you replace metal halide bulbs with LED?
Typically, the type of metal halide light bulb used in high bay applications has a rated life of around 20,000 hours. A 400 watt metal halide bulb can be replaced with a 200 watt LED. A 100 watt metal halide can be replaced with a 50 watt LED.
Can you touch a metal halide bulb?
Metal Halide Bulbs. Replacement metal halide bulbs. Remember, when putting in new Metal halide bulbs you should never touch the unit with your hands. The reason you do not want to do this is the oils on your hands will come in contact with the glass lamp thus shorting out the life cycle of the light.
How long does a metal halide ballast last?
A ballast – in general – should lasts about 50,000 burning hours if applied in an approved fixture and used at listed ambient.
How does a metal halide bulb work?
To put it simply, metal halide technology works by passing an electrical arc through a mix of gasses, creating light. The bulb contains two primary parts: the inner arc tube and the outer bulb. When the lamp is inactive, the mercury and metal halide salts are condensed inside the inner arc tube.
Are mercury vapor lights energy efficient?
Mercury vapor lamps are more energy efficient than incandescent and most fluorescent lights, with luminous efficacies of 35 to 65 lumens/watt. Their other advantages are a long bulb lifetime in the range of 24,000 hours and a high intensity, clear white light output.
What causes metal halide lamps to explode?
Metal halide lamps contain high-pressure gases in the arc tube. In the case of non-passive failure, the pressurized arc tube within the lamp causes the explosion. When the arc tube explodes, molten glass can fall from the fixture, which presents an obvious issue if a fixture is installed above flammable materials.
Are all metal halide bulbs pulse start?
Pulse start metal halide light bulbs do not have the starter probe electrode. Instead they have a high-voltage igniter that works with the ballast to start the light bulb using a series of high-voltage pulses (typically 3 to 5 kilovolts).
What Kelvin is metal halide?
With the introduction of specialized metal-halide mixtures, metal-halide lamps are now available with a correlated color temperature from 3,000 K to over 20,000 K. Color temperature can vary slightly from lamp to lamp, and this effect is noticeable in places where many lamps are used.
Why does my metal halide light go on and off?
Metal Halide Lamps Normal end-of-life is caused by sodium loss from the arc tube. The lamp may be hard to start. High Pressure Sodium Lamps Normal end-of-life is usually indicated by the lamp cycling on and off.
When should metal halide bulbs be replaced?
In the case of Metal Halide, most manufacturers rate these HID light bulbs with a life of approximately 20,000 hours. This rating traditionally means the point in which 50% of the lamps will fail, but in the case of maintenance, this is the DO NOT EXCEED time of all lamps. At this point, all lamps should be replaced.
How do you troubleshoot a metal halide light fixture?
How to Troubleshoot a Metal Halide Light Fixture Check the lamp — it may have become loose in the socket. Read the ballast specifications on the nameplate, including voltage, wattage and lamp type, and be sure they agree with the characteristics of the bulb. Turn off the breaker supplying the lamp and tighten the connections on the ballast with a screwdriver.
How do you troubleshoot a high pressure sodium light?
Troubleshooting High Pressure Sodium Lights The Bulb. The most common problem with a high pressure sodium light is the bulb. The first course of action is to simply change the bulb. Wiring. Check all wiring for any signs of loose connections or burned wires. Ballast and Capacitor. Test the input voltage and output voltage of the ballast transformer.
What does a capacitor do in a metal halide light?
Capacitors are used as a power factor correcting or current regulating device and provide the control necessary to ensure proper lamp and ballast operation. Different wattages, voltages, and ballast types require a variety of different capacitor values.