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Fluorescent tube are graded in 1/8 ths of an inch. When you speak of a T8 what this means is that the tube diameter is 8/8 ths or 1 inch. A T12 is 12/8 ths or 1 and 1/4 inches. What you have to find out is what type of ballast is in the fixture. T12's are associated with transformer type ballasts, like wise T8's are associated with electronic ballasts. The T8's have a different pin configuration wiring than that of the T12 tube. The T12 will not work in sockets wired for electronic ballasts.
When the lamp fails to ignite. Starters in fluorescent fixtures is old technology called instant start. Newer fixtures use rapid start ballasts that did away with the starter. Now new fixtures have electronic ballasts and that has done away with the old coil and tar ballasts that, when shorted out used to drip tar all over the inside of the fixture. Love new technology.
Depends if ballast is in fixture and switch is on. Several watts if new ballast and perhaps 15 watts for old ballasts....
six main component of fluorescent tube light
A four tube fluorescent luminaire is just 4 separate fluorescent lamp circuits in one fitting. Look up 'how things work' etc to see a fluorescent lamp circuit.
We don't use ballasts for LEDs. Ballasts are used with fluorescent lighting fixtures to both step up voltage to fire the tube and to provide an in-circuit load when the tube fires and conducts. LEDs have a series resistor either integral to the LED or separate to it which limits current in the LED when it is turned on.
Fluorescent tube are graded in 1/8 ths of an inch. When you speak of a T8 what this means is that the tube diameter is 8/8 ths or 1 inch. A T12 is 12/8 ths or 1 and 1/4 inches. What you have to find out is what type of ballast is in the fixture. T12's are associated with transformer type ballasts, like wise T8's are associated with electronic ballasts. The T8's have a different pin configuration wiring than that of the T12 tube. The T12 will not work in sockets wired for electronic ballasts.
It was Alexandre-Edmond Becquerel who first conceived the idea of placing a fluorescent coating on the inner surface of a high voltage gas discharge tube but he didn't quite made it work properly. Tesla's investigations in the area of high-voltage RF power processing techniques did result in the very first high efficiency, high frequency lighting ballasts in 1892.
Fluorescent bulbs, including Compact Fluorescent Lamps (CFLs) are designed to last longer because they have no filament to burn out.However, many of the current CFLs will prematurely fail (before their estimated lifespan) because the components or designs of their ballasts were compromised when translated from the older tube-type fluorescents. These ballasts are sensitive to heat buildup in enclosed fixtures. The life of any bulb is greatly affected by the number of cycles (on and off) they experience, as well as any fluctuations in the power supply.
When the lamp fails to ignite. Starters in fluorescent fixtures is old technology called instant start. Newer fixtures use rapid start ballasts that did away with the starter. Now new fixtures have electronic ballasts and that has done away with the old coil and tar ballasts that, when shorted out used to drip tar all over the inside of the fixture. Love new technology.
ionized Mercury vapor emits UV light.phosphor coating on inside of tube absorbs UV light and emits visible light.visible leaves tube.
It is possible, depending on the ballast wiring to the tubes. Some ballast units actually contain multiple independent ballasts that would be hooked to individual tubes or pairs of tubes independently. Some ballasts may control all the tubes in one fixture and when one tube fails the others either go out or flicker badly.
Fluorescent tube lighting can be purchased at any do-it-yourself retail outlet such as Homebase. Alternatively you may purchase some online with a more varied size and colours from websites such as Amazon.
At least one, and possibly two.
Depends if ballast is in fixture and switch is on. Several watts if new ballast and perhaps 15 watts for old ballasts....
six main component of fluorescent tube light
A four tube fluorescent luminaire is just 4 separate fluorescent lamp circuits in one fitting. Look up 'how things work' etc to see a fluorescent lamp circuit.