Most Mercury Vapor Lamp Fixtures have a PLUG IN module on top of the fixture. Most are about the size of an inverted "shot glass" and have a photocell "eye" somewhere on the outside surface. Typically, you turn the Module counterclockwise to "unlock" the module from the socket and pull the module UP and off the top of the lamp fixture.
Failure mode for these Light Sensors are twofold: Either [ 1 ] the electric eye's lens gets cloudy and the light stays on unless it is VERY sunny....or [ 2 ] the Module, being mounted ABOVE the light fixture gets HOT...and over the years the module gets COOKED and fails. Take the light sensor with you to an electrical supply house and match it up with a new one !!
BYW: Inspect the socket and plug of the Light Sensor module & lamp fixture. Often the "cooked module" will fail because of socket/plug failure. The plug/socket Phenolic materials break down from the heat over the years . Or the contacts corrode.
NOTE: It is important , when installing the Light fixture...that the plug-in Light Sensor' photocell lens is pointing AWAY from the building or other mounting structure. If the "electric eye' is facing the structure..the reflected light will confuse the light sensor and the lamp will come on DIM[*] , flicker or turn off & on constantly.
[ * ] Do not confuse the " comes on DIM " statement with the normal DIM warmup cycle of the lamp.
It is also advised to have the High Output Merury Vapor LIght on a dedicated electrical circuit. If you are using an existing circuit for outside-the-house loads..... such things like pool pumps etc will extinguish the lamp when the pump kicks in.. The pump's heavy inductive load in-rush current on startup will cause the lamp to go out..... in a few minutes the lamp will restart, warm up and come back at full intensity.
The sensor has to be in its socket to test it as it needs power to it to operate. Cover the sensor completely with a dark cloth so that no light can get to any part of the sensor. The light fixture should turn on. If it does not then remove the lamp from the fixture and check for voltage in the lamp socket. If there is voltage there, then the lamp is At Fault. What we are now checking for is whether the sensor is operating and the lamp or ballast is at fault. If there is voltage at the lamp socket then the sensor is operating. If there is no voltage at the lamp socket or ballast the sensor is faulty, it needs to be changed out for a new one.
Between Metal Halide and Mercury Vapor the higher output is emitted from the Metal Halide lamp.
They produce light by using mercury vapor :D=======================Answer #2:Some (not many) pass electric current through mercury vapor, causing it to glow violet.Some pass electric current through sodium vapor, causing it to glow yellow.Some pass electric current through a thin wire, causing it to heat and glow ...a process is identical to that in every incandescent light bulb in your house.Some burn natural gas.
Mercury is a poisonous elements. Symptoms of poisoning by mercury vapor include insomnia, headaches, weakness, tremors, twitching, sensation disturbances and changes in nerve responses.
No. A mercury vapor lamp will work on a metal halide ballast, but not the other way around.
I would compare lamps of the same wattage to see which one puts out more lumens, which is the measurement of actual light output.
mercury vapor
Mercury Vapor
Between Metal Halide and Mercury Vapor the higher output is emitted from the Metal Halide lamp.
To change a fuel vapor sensor on a 1997 GMC Sonoma you need to disconnect the wires that are holding it in place. Next, remove the old sensor and replace with the new one.
It is a low weight mercury-vapor gas-release light that uses fluorescence to deliver obvious light. An electric current in the gas energizes mercury vapor which creates short-wave bright light that then causes a phosphor covering within the globule to sparkle.
Ionized mercury vapor radiates in the near ultra-violet (a high energy source of radiation) which energizes the fluorescent coating inside the bulbs.
Blue Light
Dude! Did you not read your question??? You said Mercury Vapor! You don't fix it! It's Mercury vapor. You're "playing with fire there." You need to call your local municipality/township and find out where the nearest hazardous disposal facility is for this bulb and dispose of it properly. Then go to the store and buy a new bulb.
They change from a liquid to a vapor (gas).
The electrons in the mercury arc current in the tube causes the mercury vapor to emit ultraviolet light. The inside surface of the tube is coated with a phosphor that glows with visible light when hit by ultraviolet light.
I know that Black lights and mercury vapor lights (including CFLs) attract more moths than incandescent lamps, but I'm not sure if black lights are better than mercury vapor lights.
A 400 watt Mercury vapor light bulb produces roughly 23,000 lumens. In comparison to a 400 watt metal haloid and or high-pressure sodium, not as good. Metal haliod and high-pressure sodium produces 30,000 lumens.