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2. Mercury-vapor lamp - Wikipedia

   en.wikipedia.org/wiki/Mercury-vapor_lamp

   A 175-watt mercury-vapor light approximately 15 seconds after starting. A closeup of a 175-W mercury-vapor lamp. The small diagonal cylinder at the bottom of the arc tube is a resistor which supplies current to the starter electrode. A mercury-vapor lamp is a gas-discharge lamp that uses an electric arc through vaporized mercury to produce ...

3. Fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Fluorescent_lamp

   The spectrum of light emitted from a fluorescent lamp is the combination of light directly emitted by the mercury vapor, and light emitted by the phosphorescent coating. The spectral lines from the mercury emission and the phosphorescence effect give a combined spectral distribution of light that is different from those produced by incandescent ...

4. Gas-discharge lamp - Wikipedia

   en.wikipedia.org/wiki/Gas-discharge_lamp

   Germicidal lamps are simple low-pressure mercury vapor discharges in a fused quartz envelope. Gas-discharge lamps are a family of artificial light sources that generate light by sending an electric discharge through an ionized gas, a plasma. Typically, such lamps use a noble gas (argon, neon, krypton, and xenon) or a mixture of these gases.

5. High-intensity discharge lamp - Wikipedia

   en.wikipedia.org/wiki/High-intensity_discharge_lamp

   Phosphor Coating: Some HID lamps, like Mercury Vapor lamps, also utilize phosphor coatings on the inner surface of the arc tube. These phosphors absorb the ultraviolet (UV) light emitted by the excited gas atoms and then re-emit visible light. The combination of UV light and the emitted visible light creates a broader spectrum of colors.

6. Metal-halide lamp - Wikipedia

   en.wikipedia.org/wiki/Metal-halide_lamp

   Output spectrum of a typical metal-halide lamp showing peaks at 385nm, 422nm, 497nm, 540nm, 564nm, 583nm (highest), 630nm, and 674nm. Because of the whiter and more natural light generated, metal-halide lamps were initially preferred to the bluish mercury vapor lamps.

7. Arc lamp - Wikipedia

   en.wikipedia.org/wiki/Arc_lamp

   A mercury arc lamp from a fluorescence microscope. A krypton long arc lamp (top) is shown above a xenon flashtube. The two lamps, used for laser pumping, are very different in the shape of the electrodes, in particular, the cathode (on the left). An arc lamp or arc light is a lamp that produces light by an electric arc (also called a voltaic arc).

8. Hydrargyrum medium-arc iodide lamp - Wikipedia

   en.wikipedia.org/wiki/Hydrargyrum_medium-arc...

   HMI lamps are approximately the same color temperature as the sun at noon (6000 K), and like other high intensity discharge lamps which contain mercury, generate ultraviolet light. Each HMI fixture has a UV safety glass cover that should be used to protect people who may be in front of the light.

9. Franck–Hertz experiment - Wikipedia

   en.wikipedia.org/wiki/Franck–Hertz_experiment

   The figure at the right shows the spectrum of a Franck–Hertz tube; nearly all of the light emitted has a single wavelength. For reference, the figure also shows the spectrum for a mercury gas discharge light, which emits light at several wavelengths besides 254 nm. The figure is based on the original spectra published by Franck and Hertz in 1914.