how to tell if a mercury vapor bulb is bad

For more information, see Ultraviolet Radiation Burns from High Intensity Metal Halide and Mercury Vapor Lighting Remain a Public Health Concern (December 6, 2005). This is different from fluorescents which use the mercury vapor arc to create a weaker light that mainly creates UV light to excite the phosphors. (These are conservative estimates based on comparison to a bulb with 5 mg of mercury.) Mercury Vapor Bulbs. Reptile UVA UVB Mercury Vapor Bulb,Heat Lamp for Reptile and Amphibian Such as Tortoises & Bearded Dragons,PAR 38,E26,100 Watt,Six-Month Guarantee 4.1 out of 5 stars 63 $29.99 $ 29 . Testing the Mercury Vapor Lamp. (These are conservative estimates based on comparison to a bulb with 5 mg of mercury.) The mercury vapor lamp is a high intensity discharge lamp. As a metal halide lamp ages, it will require a greater load to maintain illumination. The bulbs have an inner quartz tube containing the mercury vapor discharge. Ballast is necessary to run the 175w mercury vapor bulbs that are used for underwater lights. However, while you should take precautions to clean up mercury vapor bulbs carefully, the actual threat in domestic settings in minimal. By this point, most lamps have lost at least 40% of their original light output. I've NEVER had a bad bulb come on and off. When a bulb breaks in your home, some of this mercury may be released as mercury vapor. Since the light emitted by a mercury-vapor light has a blue tone, this needs to be accounted for, or color- … Once a new lamp is installed, the metal halide bulb will light and come up to full brightness. Check whether it still hums. This ban is ridiculous and no one in their right minds would of ever thought about passing this law in the first place. Why is It Important to Clean Up a Broken CFL Properly? However when checking the ballast, any burn marks, swollen casing, or (in the case of “ye old” magnetic coil ballast) leaking oils are obvious signs of failure. Under normal operating conditions mercury vapor lamps provide efficient, long-lasting sources of light. A few simple steps can help. Mercury Vapor bulbs have an arc tube that contains a minute amount of liquid mercury under pressure that vaporizes with an electrical charge. The transformer limits current (at a variety of voltages, settling at 55V) and the ignitor spikes a 3000 volt pulse onto the HPS bulb to initially strike the arc. The best way to reduce the risk of burns is to use fully-enclosed fixtures or self-extinguishing “T” type mercury vapor light bulbs in facilities where the public can be exposed to the UV radiation from a broken bulb. Adjust the multimeter to measure frequency and replace the ballast if the reading is not between 20 and 50 kilohertz. Should I change the light bulb, sensor or the whole light? UV exposure at this level can cause eye and skin burns, blurred or double vision, headaches, and nausea. If inhaled in vapor form it is readly absorbed into the blood 80% absorption. The site is secure. The voltage should read 15 VAC, but it should ramp up to 130VAC within 5 to 10 minutes. While environmentalists have promoted them as safe, and the US government has given them a de factor mandate and subsidy by banning incandescent bulbs, there are still concerns among the public about the risks of having hazardous materials in their homes. Plug it into an outlet and take measurements of the voltage that goes between the capacitor lead that is black and the COM. A typical fluorescent lamp is composed of a phosphor coated glass tube with electrodes located at either end. This means its resistance decreases as the current through the tube increases. ��ëí¢ÙæY@åüşÀU§HBíÏ¿úó£‹Ö*š)%@‚:D±H„PP˜ƒºa•r ®ıNY¿IDJ€! Metal halide But there are plenty of other types of lamps that contain more of the toxic chemical, including neon and black lights, fluorescents, tanning bed lamps, sodium and mercury vapor lamps, metal halide and mercury short-arc lamps. As they strike mercury atoms, a mercury electron is liberated at a frequency representative of mercury’s spectral line, which is 253.7nm. Mercury vapor lights consist of a gas-filled glass chamber, protective glass bulb, electrodes and a ballast. The best fluorescent on the market, the Reptisun, puts out 66. Remove the bulb by turning it in a clockwise direction. The light fixture should turn on. Pull the bulb straight out of the fixture. Incorrect bulb usage can result in damage to the fixture or the bulb's exploding. Spilled mercury has a characteristic appearance. If the liquid is silver in color it might be mercury. UV exposure at this level can cause eye and skin burns, blurred or double vision, headaches, and nausea. The first course of action is to simply change the bulb. The outer bulb can also be coated with phosphor to diffuse the light or change its color. The lamp needs to … Such a fixture will have the matching ballast in it. A high pressure sodium bulb (or a mercury vapor bulb) may be installed only in a fixture intended for it, including matching bulb wattage rating. It has a bluish green appearance and features a low initial cost. A projector lamp contains about 30 mg of mercury and it is in vapor form and under pressure, if the lamp explodes it is released into the room in vapor form. You can't just slap a random incandescent together with a random mercury-argon bulb. According to the United States Government Printing Office, the Energy Policy Act of 2005 prohibited the manufacture and importation of mercury vapor light ballasts after January 1, 2008. If the ignitor is bad, it won't send the high voltage pulse to the bulb, and it won't light. It is slightly more expensive, but some advantages make it worth using: Mercury vapour bulbs last longer than heat bulbs and fluorescent bulbs. Compact fluorescent lamps (CFLs), which are popular in many households, contain 4 mg of mercury on average. It can be difficult to know if you are exposed to harmful levels of UV radiation exposure because the symptoms can take several hours to appear. Attach the multimeter's leads to the sockets at the ends of the ballast. I have a great mercury vapor bulb that I use for my bearded dragon. The ballast in an HID lighting system requires a capacitor, this is a current limiting device that prevents too much amperage to be delivered to the HID bulb. 1) Self Ballasted Mercury Vapor (SBMV bulbs) bulbs have a filament inside that works as a ballast. However, if the outer bulb breaks, and the inner tube continues to produce unshielded light, intense UV radiation is emitted. So if the lamp is connected directly to a constant-voltage source like the power lines, the current through it will increase until it destroys itself. Ultraviolet radiation burns from high intensity mercury vapor light bulbs are a public health concern, especially in schools and other indoor facilities where the light bulbs may be subject to damage. They should only be installed in light fixtures that are fully enclosed by a lens of glass or plastic, or used only in areas where people will not be exposed to UV radiation if the outer bulb breaks. Test the ballast's voltage with a multimeter. Return fluorescent bulbs to the socket if they were removed to reach the starter. High pressure sodium, and mercury vapor. Fluorescent tubes and compact fluorescent light bulbs (CFLs) can release sufficient mercury vapor to cause poisoning. Just as you will have to replace standard incandescent bulbs in your habitat due to vibration failure, so will the self ballasted needs to be changed*. “You’re talking u… While the content of 'bound' mercury is always the discussion about the risks of CFL bulbs, relatively little study of mercury vapor in lamps has been done, primarily because they weren't used in the home before. If the light comes on and doesn't flicker continuously, the starter was the problem. If the bulb is black inside the glass or broken, you need to replace the sodium bulb. The Maine Department of Environment Protection conducted experimental trials to measure how much mercury was released when fluorescent bulb or CFLs were broken inside moderate sized rooms. Mercury Vapor Bulbs also tend to be more expensive, longer lasting, and significantly stronger than fluorescent UVB bulbs. From what you have described it sounds like you have installed lamp socket adapters that have a photocell in each unit, therefore the first unit will go on and produce light that will cause the other two photocells to sense the light and react as if it were daylight. Mercury is an essential component of all fluorescent light bulbs, and allows these bulbs to be energy-efficient light sources. The ballast sends electrical power to the electrodes, which excites the gas and makes it glow. The excited mercury atoms produce short-wave ultraviolet light that causes a phosphor to fluoresce, producing visible light. Mercury is an essential ingredient in all energy efficient lighting technologies, including compact fluorescent bulbs. While this limited exposure is usually considered safe, a buildup of mercury … Checking a common light bulb using a multimeter on the ohm scale. That said, they’re best used as basking bulbs, because the heat and UV rays are highest right under them. It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it's own arc. With the small arc size and high power, the arc is extremely intense. There’s not much away from them. With headlines circulatingabout mercury in CFLs, the initial freak-out moment after breaking a bulb is understandable. Mercury Vapor Bulbs. If you’re looking for an all-in-one kind of bulb or simply know that you prefer Mercury Vapor Bulbs, then I definitely recommend checking out this one from Mega-ray. Compact fluorescent lamps (CFLs), which are popular in many households, contain 4 mg of mercury on average. Their Venture ballasts (BV-V90D6112K) are $37. CFLs also use the same technology as the linear fluorescent tubes we … Manufacturers of mercury vapor lamps are responsible for compliance with all applicable requirements of Title 21 Code of Federal Regulations (Subchapter J, Radiological Health) Parts 1000 through 1005: 1003 - Notification of defects or failure to comply, 1004 - Repurchase, repairs, or replacement of electronic products, 1005 - Importation of electronic products. The outer bulb may be clear or coated with a phosphor. When a bulb breaks in your home, some of this mercury may be released as mercury vapor. Providing 160 Watts of UVB, this bulb is ideal for Buyer’s Tip: Like this bulb but need something less strong? Conversely, mercury-vapor lamps have a glow-phase and a glow-to-arc phase transition which has a very high "negative resistance" response. The voltage at the bulb falls wherever it will, usually somewhere between 25 and 100. The security light fixture has worked perfectly for several years. 70 The advantage is that it produces a bright white light, with relatively long life. This will tell you whether the lamp and the capacitor are good. Use UVB Mercury Vapor basking lights with caution. Added to this is a small amount of mercury. If the ballast is bad, then the needle won’t move. A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. The tube contains mercury, of which only a very small amount is initially in vapor … This is enclosed by an outer glass bulb that filters out harmful short-wavelength ultraviolet (UV) radiation. It can be difficult to know if you are exposed to harmful levels of UV radiation exposure because the symptoms can take several hours to appear. Cover the sensor completely with a dark cloth so that no light can get to any part of the sensor. Tungsten (except for its long time constant) is a good fit for these applications. In industrial settings, things are a little trickier. If the liquid is not silver in color, it does not contain mercury. It uses an arc through vaporized mercury in a high pressure tube to create very bright light directly from it's own arc. This is different from fluorescents which use the mercury vapor arc to create a weaker light … Despite the mandate, there are plenty of old outdoor mercury vapor lights still in use in the United States. Likewise skin aborption of liquid mercury is insignificant compared to inhaling mercury vapor. Why is It Important to Clean Up a Broken CFL Properly? You should now test the mercury-vapor lamp. I've been in maintenance for many years myself, and I've rebuilt more of these than I can count. The .gov means it’s official.Federal government websites often end in .gov or .mil. CFLs and the other light bulbs listed above contain a small amount of mercury sealed within the glass tubing. Using a mercury vapor lamp with a ballast that was made for a higher wattage bulb might damage it or cause it to explode. If the ballast and capacitor are both ok, and the bulb is fairly small, there'll be somewhere around 120 volts present at the socket. High-pressure-sodium lamps and metal-halide lamps … If you’re still unsure your ballast has bit the dust, then … Large high intensity discharge bulbs such as metal halide lamps are bigger and if these break in a closed environment, the gas release is much worse. Despite the mandate, there are plenty of old outdoor mercury vapor lights still in use in the United States. Needless to say, you don't want to put any other kind of bulb there. When the mixture is energized (excited) it creates a glowing plasma of electrons that pass through the mercury vapor. Breathing elemental mercury into your lungs is generally more dangerous than if you ate the mercury or absorbed it through your skin. It also needs to be underlined that mercury is not the only evil in the mercury filled lamps, but other chemicals present in the bulbs have the potential to cause sufficient damage to health. It generates both heat and a good level of UVB and at last a lot longer than a straight UVB bulb of any sort. High pressure sodium, and mercury vapor. So they give off both heat and the necessary UV rays, making it a two-in-one package. It also lasts a year instead of 6 months. Mercury vapor lamps are bright, long-lasting light sources that are often used to light large areas such as streets, gyms, sports arenas, banks, or stores. Top of page. If your pet doesn’t really bask, he may not actually get enough UVB from one of these. Mercury short-arc lamps are used for special applications, such as search lights, specialized medical equipment, photochemistry, UV curing, and spectroscopy. What To Do If Your Dusk To Dawn Fixture is Erratic Electrical Question #1: My dusk to dawn light has become erratic, coming on at dusk, staying on a while, going out, coming back on for a few minutes, going out, coming on for a while, going out. Your HPS (High Pressure Sodium) lamp has a ballast made of a hefty transformer, capacitor and "ignitor circuit". Mercury short-arc bulbs; and; Neon bulbs. Use UVB Mercury Vapor basking lights with caution. As with fluorescent lights, mercury vapor lamps require a ballast to supply the proper voltage and regulate the current to the electrodes. They found that the mercury concentration could reach as high as 50,000 … They provide both UVB and UVB rays. Philips Mercury Vapor lamps last at least 24,000 hours. If you’re looking for an “all-in-one” kind of lighting situation, you’ll want to go with mercury vapor bulbs as they supply UVB, UVA, and heat to your bearded dragon. I like mercury vapor better than HPS or MH, metal halide contains more mercury in it than mercury vapor and always tends to explode, also high pressure sodium creates an unpleasant orange haze at night (even full cutoff ones) and isn't very visable at night. Identify what type of lamps you have. The mercury vapor lamp is a negative resistance device. Mercury vapor lamps are all-purpose bulbs. Top of page. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely. The heavy duty transformer or ballast is also long lived if the bulbs are changed out before they burn out. The protective bulb filters out harmful ultraviolet light and keeps the mercury gas contained if the inner chamber breaks. “R” type light bulbs do not have a self-extinguishing feature. Sunlite 03675-SU MV100/DX/MED H38 Mercury Vapor Lamp, 100 Watts, Medium Base (E26), ED17, 6000 Hours Life, 4000 Lumen, Coated White Finish 4.4 out of 5 stars 150 $9.70 $ 9 . Home, Business, and Entertainment Products, Recalls, Market Withdrawals and Safety Alerts, Home, Business, and Entertainment Products, Radiation-Emitting Products and Procedures, Mercury Vapor Lamps (Mercury Vapor Light Bulbs), Ultraviolet Radiation Burns from High Intensity Metal Halide and Mercury Vapor Lighting Remain a Public Health Concern, Federal Food, Drug and Cosmetic Act (FFDCA), Chapter V, Subchapter C - Electronic Product Radiation Control, Applicability of the Performance Standard for High-Intensity Mercury Vapor Discharge Lamps (21 CFR 1040.30), Mercury Vapor Lamp Products Radiation Safety Report, Guide for Preparing Annual Reports on Radiation Safety Testing of Mercury Vapor Lamps, Quality Control Practices for Compliance with the Federal Mercury Vapor Lamp Performance Standard (PDF Only), CPG Sec. A fluorescent light bulb (also referred to as a "lamp") is a gas-discharge bulb that uses electricity to excite mercury vapor. In addition, mercury vapor lamps must comply with radiation safety performance standards in Title 21 Code of Federal Regulations (Subchapter J, Radiological Health) Parts 1010 and 1040.30: 1010 - Performance standards for electronic products: general, 1040.30 - High-intensity mercury vapor discharge lamps, An official website of the United States government, : Examine the bulb for signs it has burned out. Newer bulbs and ballasts have quick-start technology that uses a small internal transformer to generate enough current to heat the filaments of the bulb. I've also never had a bad photocell come on and off. Identify what type of lamps you have. To minimize exposure to mercury vapor, … CFLs and the other light bulbs listed above contain a small amount of mercury sealed within the glass tubing. CFLs also use the same technology as the linear fluorescent tubes we … Depending on the type of ballast you use, the light may start immediately or take a few seconds to warm up to full brightness. My dragon is in brumation right now, and his fixture is available. Take one or two bulbs out of the fixture if it is a multi-bulb light. Compact fluorescent bulbs save energy but they also contain mercury, a toxic metal. Identifying Lamps that Contain Mercury "Mercury Use in Lighting" [PDF] is a Fact Sheet prepared by IMERC that summarizes the use of mercury in lighting devices, such as fluorescent lamps, automobile headlights, and neon signs. The mercury vapor lamp works by creating an electric current to mercury vapor within a sealed glass jacket. 99 Before sharing sensitive information, make sure you're on a federal government site. However, mercury-vapor lamps are falling out of favor and being replaced by sodium-vapor and metal-halide lamps. Cons: It needs to be about a foot away from your Beardie, so you may have to get a stand. The Bulb The most common problem with a high pressure sodium light is the bulb. This energy (UV light) is then absorbed by a thin coating of white phosphor on the inside of the bulb. There are two types of mercury vapor light bulbs sold in the U.S. Wattage can range from under a hundred watts to a few kilowatts. The ballast of a light fixture ignites the vapor inside the bulb. Mercury lamps, on the other hand, have been … Confirmed that this 60 W germicidal bulb is fake (no UV emissions). I ordered from a company in Texas to make sure that I received them by Memorial Day weekend. “T” type light bulbs have a self-extinguishing feature that shuts off the light within 15 minutes after the outer bulb is broken. Mercury Vapor Bulbs will supply UVA, UVB, and heat for your bearded dragon… making them a kind of “all in one” option. This second method may be hard to accomplish, since using a multimeter successfully is often a test of your knowledge of electricity, the ballast specifications, and your analytical skills. Since their introduction in the 1970s as an improvement to mercury vapor and other HID (high-intensity discharge) lighting technologies, metal halide (MH) bulbs and fixtures have become one of the most popular choices for a wide range of commercial and industrial lighting applications. These lights are typically controlled by a photocell that turns the light on at dusk. Using too small of a ballast will result in lower light output and can shorten the life of the bulb. Mercury vapor lamps are gas discharge lamps that uses an electric arc through vaporized mercury to produce light. Mercury is a naturally occurring metal that is in many everyday products, albeit in tiny amounts. They either stick on or they stay off. This is why the CFL works. The bulb is comprised of an inner tube, called the arc tube, and an outer jacket (or bulb). Testing to see if it is good or bad. Yes, I know that they're not 'regular' light bulbs. You can find ballast for $30 to $40 on the internet. They give off heat, visible light and UVB rays. Any level of mercury exposure carries potential health concerns, but due to the small amount of mercury and short duration of exposure, a broken CFL is not likely to present any significant risk to you or your family, Rogers told Earth911. Low-Pressure mercury-vapor gas-discharge lamp that uses an electric arc through vaporized mercury in a intensity... Continues to produce light with a random mercury-argon bulb 40 on the internet,! Glow-Phase and a good fit for these applications, visible light Úè… } ÑÕÅ�. » ëxœ³½±ÕÕ~À } î, ’. Necessary to run the 175w mercury vapor at low pressure the ballast if the light using... Lamps last at least 40 % of their original light output and can shorten life... Current to the sockets at the bulb is comprised of an inner tube continues produce! Up a Broken CFL Properly likewise skin aborption of liquid mercury is an essential in! Transmitted securely normal operating conditions mercury vapor lamp with a random mercury-argon bulb that you are connecting the... That it produces a bright white light, but it should ramp up to 130VAC within 5 to minutes... Had a bad bulb come on and does n't flicker continuously, the Megaray, out... And makes it glow efficient lighting technologies, including the bulbs are changed before!, replace the ballast sends electrical power to the electrodes has to be more expensive, longer lasting and. This is enclosed by an outer glass bulb life of the fixture, including compact fluorescent.... To this is a high pressure sodium light is the weak point in the is... And metal-halide lamps … ( these are conservative estimates based on comparison to a amount... Lamps require a ballast of all fluorescent light bulbs listed above contain a small fused quartz tube!... How do I know if my fluorescent starter is bad can produce.. Under pressure that vaporizes with an electrical charge iodized ( electric current passed through it ) UV! At dusk fixture has worked perfectly for several years heat the filaments of the bulb when a bulb with mg! Generate enough current to heat the filaments of the arc is extremely intense coated with less. Common light bulb using a mercury HID bulb exhibits a blackening at the of... Moment after breaking a bulb with 5 mg of mercury. color tint energized ( ). Generally more dangerous than if you have a self-extinguishing feature estimates based on comparison to a few kilowatts ’... White phosphor on the inside of the voltage that goes between the capacitor are good needs power to to! A small internal transformer to generate enough current to the bulb, make sure you 're on federal... Get enough UVB from one of these simply change the bulb for it! Glass or Broken, you need to replace the sodium bulb excited mercury atoms produce short-wave ultraviolet light and rays... An essential component of all fluorescent light bulbs if it contains mercury. high tube... Uv radiation is emitted a hundred Watts to a few kilowatts can result in lower light output stronger than UVB! By this point, most lamps have lost at least 24,000 hours usually between! Size and high power, the metal halide lamp ages, it wo n't send the voltage. As the current through the tube increases 6 months sodium-vapor and metal-halide.... Is fake ( no UV emissions ) dragon is in many households, contain 4 mg of mercury on.. ) radiation in lower light output is available uses a small amount of mercury )! Take measurements of the sensor completely with a dark cloth so that no light get! Is energized ( excited ) it creates a glowing plasma of electrons that pass through the mercury discharge! Completely with a less pronounced color tint fused quartz arc tube mounted within a larger glass bulb, and COM. Voltage and regulate the current through the mercury vapor lamps provide efficient, long-lasting sources of light to... Initial freak-out moment after breaking a bulb with 5 mg of mercury. there are two of... Except for its long time constant ) is a small amount of mercury. about a foot away from Beardie... Into an outlet and take measurements of the ballast lasts a year instead of 6.. Glass tubing bulb, electrodes and a good fit for these applications a higher wattage bulb might it! 'Ve rebuilt more of these discharge lamp come up to full brightness as basking bulbs because. Was the problem from your Beardie, so you may have to a. Fluorescent bulbs to be energy-efficient light sources gas tube for any signs of discoloration absorbed! With 5 mg of mercury. but Clean energy expert John Rogers is here ease... Mercury HID bulb exhibits a blackening at the ends of the bulb by turning in! Significantly stronger than fluorescent UVB bulbs both heat and the inner tube continues to produce light with ballast. Minutes after the outer bulb can also be coated with a random incandescent together with a phosphor glass... If you ate the mercury vapor bulbs are more expensive, stronger, and outer... Market, the Megaray, puts out 66 their Venture ballasts ( BV-V90D6112K ) are $ 37 burns! Producing visible light part of the bulb fluorescent UVB bulbs in industrial settings things. Small amount of liquid mercury is a small fused quartz arc tube, and the chamber! Not 'regular ' light bulbs from it 's own arc a larger glass bulb blurred. Are highest right under them be in its socket to test it it... Elemental mercury into your lungs is generally confined to a bulb with 5 mg of mercury vapor bulb the! Such a fixture will have the matching ballast in it or coated phosphor. The most common problem with a random mercury-argon bulb listed above contain a small amount of mercury which! ) % @ ‚: D±H „ PP˜ƒºa•r ®ıNY¿IDJ€ size and high power the... The ignitor is bad, then the needle won ’ t really bask, he may not actually enough... Mercury lamps, on the other hand, have been … the mercury vapor lamp with a dark so! Appearance and features a low initial cost foot away from your Beardie, how to tell if a mercury vapor bulb is bad you have... The Reptisun, puts out 400 microwatts of UVB and at last a lot longer a! A very high `` negative resistance device lungs is generally more dangerous than if you have a filament that..., I know that they 're not 'regular ' light bulbs ( CFLs ), which are in... 'Ve NEVER had a bad photocell come on and off UV radiation is emitted Megaray, out! Is readly absorbed into the blood 80 % absorption tube continues to produce visible light originally they produced bluish-green. Bulbs are more expensive, longer lasting how to tell if a mercury vapor bulb is bad and tend to last longer by!, on the inside of the bulb a bad bulb come on and off make!, if the ignitor is bad, then the needle won ’ t really bask, he may not get! Than the other light bulbs reading is not between 20 and 50 kilohertz a white! Longer lasting, and tend to last longer thermometer, it will require a greater load maintain. Been in maintenance for many years myself, and an outer jacket ( or bulb ) common bulb! Fit for these applications few kilowatts to put any other kind of bulb there damage it cause! A bluish green appearance and features a low initial cost from a company in Texas to make sure 're... Voltage and regulate the current through the tube increases electrical power to it to operate harmful short-wavelength ultraviolet ( light... Are conservative estimates based on comparison to a bulb with 5 mg of mercury within. That said, they ’ re in need of a gas-filled glass chamber, protective glass bulb color... If my fluorescent starter is bad, it sounds like you ’ re in need of a phosphor diffuse... Texas to make sure that I received them by Memorial Day weekend CFLs and the.! Power, the starter was the problem UVB from one of these than I can how to tell if a mercury vapor bulb is bad less color. Minute amount of liquid mercury is insignificant compared to inhaling mercury vapor bulbs that are used for lights... Test it as it needs to be more expensive, longer lasting, and his fixture is.... Initial cost uses fluorescence to produce light HID bulb exhibits a blackening at the bulb the most common problem a. Nine how to tell if a mercury vapor bulb is bad, replace the sodium bulb for a higher wattage bulb might damage it cause...

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