Geissler invented the first gas-discharge lamp, the Geissler Fluorescent tube, consisting of a partially evacuated glass Fluorescent tube with a metal electrode at either end.
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20 Facts About Fluorescent tube
2.
One of the first scientists to experiment with a Geissler Fluorescent tube was Julius Plucker, who systematically described in 1858 the luminescent effects that occurred in a Geissler Fluorescent tube.
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3.
Fluorescent tube made the important observation that the glow in the tube shifted position when in proximity to an electromagnetic field.
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4.
Fluorescent tube went on to apply thin coatings of luminescent materials to the surfaces of these tubes.
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5.
That Fluorescent tube was evacuated by the highly effective mercury vacuum pump created by Hermann Sprengel.
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6.
Fluorescent tube invented a fluorescent lamp in 1896 that used a coating of calcium tungstate as the fluorescing substance, excited by X-rays, but although it received a patent in 1907, it was not put into production.
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7.
The fill gas effectively increases the distance that electrons travel through the Fluorescent tube, which allows an electron a greater chance of interacting with a mercury atom.
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8.
Fluorescent lamp tube is filled with a mix of argon, xenon, neon, or krypton, and mercury vapor.
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9.
Compact fluorescent lamps have several small-diameter tubes joined in a bundle of two, four, or six, or a small diameter tube coiled into a helix, to provide a high amount of light output in little volume.
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10.
The organic solvents are allowed to evaporate, then the Fluorescent tube is heated to nearly the melting point of glass to drive off remaining organic compounds and fuse the coating to the lamp Fluorescent tube.
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11.
Fluorescent tube lamps are negative differential resistance devices, so as more current flows through them, the electrical resistance of the fluorescent lamp drops, allowing for even more current to flow.
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12.
Fluorescent tube lamps are never operated directly from DC for those reasons.
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13.
The starter switch does not close again because the voltage across the lit Fluorescent tube is insufficient to start a glow discharge in the starter.
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14.
Usually operating at a lower arc voltage than the instant start design; no inductive voltage spike is produced for starting, so the lamps must be mounted near a grounded reflector to allow the glow discharge to propagate through the Fluorescent tube and initiate the arc discharge via capacitive coupling.
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15.
Halogen lighting is 3000 K Fluorescent lamps are manufactured to a chosen CCT by altering the mixture of phosphors inside the tube.
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16.
Fluorescent tube use is declining as LED lighting, which is more energy efficient and doesn't contain mercury, is replacing fluorescents.
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17.
Fluorescent tube lamps convert more of the input power to visible light than incandescent lamps.
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18.
Fluorescent tube lamps give off about one-fifth the heat of equivalent incandescent lamps.
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19.
Fluorescent tube lamps require a ballast to stabilize the current through the lamp, and to provide the initial striking voltage required to start the arc discharge.
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20.
Fluorescent tube lamps are a non-linear load and generate harmonic currents in the electrical power supply.
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