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A four foot tube is about $4.95.
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.
444
glass
Mercury and Phosphorous.
A pin based fluorescent light fixture is the type of fixture that takes fluorescent tubes. On each end of the fluorescent tubes there are contact pins. These pins are used to hold the tube in the fixture and to supply the voltage to the tube from the fixture's ballast.
when the tube ends blacken after failure of the tube heaters
If it's fluorescent, no.
Usually it's mercury vapor.
3 years
A fluorescent tube will flicker is the temperature is cold or the fixture has a bad ground to the electrical system.