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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 ...
Image:Fluorescente.png, Image:TLBuis.PNG, Image:Fluorescent lamp classic power circuit.jpg SVG Version of the Classic power circuit for a fluorescent light lamp A: Fluorescent Tube B: Power (+220 Volts) C: Starter D: Switch (Bi-metallic thermostat) E: Capacitor F: Filaments G: Ballast
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Spectrum with peaks labelled taken with an Ocean Optics HR2000 spectrometer of ambient light provided by fluorescent lamps. Spectrum taken by me (apparently en:user:Deglr6328 ). The spectrometer appears to be about ~.6 to .8 nm off judging from the location of known peaks.
Electronic ballast of a compact fluorescent lamp. Electronic ballasts usually supply power to the lamp at a frequency of 20,000 Hz or higher, rather than the mains frequency of 50 – 60 Hz; this substantially eliminates the stroboscopic effect of flicker, a product of the line frequency associated with fluorescent lighting (see photosensitive ...
Cross section of a typical fluorescent lamp with and without a reflector. Some lamps have an internal opaque reflector. Coverage of the reflector ranges from 120° to 310° of the lamp's circumference. Reflector lamps are used when light is only desired to be emitted in a single direction, or when an application requires the maximum amount of ...
Circular and U-shaped lamps were devised to reduce the length of fluorescent light fixtures. The first fluorescent light bulb and fixture were displayed to the general public at the 1939 New York World's Fair. The spiral CFL was invented in 1976 by Edward E. Hammer, an engineer with General Electric, [7] in response to the 1973 oil crisis. [8]
English: A Sankey diagram of energy losses in a 36 watt T8 tri-phosphor fluorescent lamp. Data from figure 7.23, page 196 of Raymond Kane, Heinz Sell Revolution in lamps: a chronicle of 50 years of progress (2nd ed.), The Fairmont Press, Inc. 2001