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A fluorescent lamp, ... The fundamental mechanism for the conversion of electrical energy to light is the emission of a photon when an ... The power level varies from ...
Fluorescent lighting is more energy-efficient than incandescent lighting elements. However, the uneven spectrum of traditional fluorescent lamps may cause certain colors to appear different from when illuminated by incandescent light or daylight. The mercury vapor emission spectrum is dominated by a short-wave UV line at 254 nm (which provides ...
Net mercury emissions for CFL and incandescent lamps, based on EPA FAQ sheet, assuming average U.S. emission of 0.012 mg of mercury per kilowatt-hour and 14% of CFL mercury contents escapes to environment after land fill disposal. CFLs, like all fluorescent lamps, contain mercury [79] [80] as vapor inside the glass
The fluorescent light is emitted in all directions. Some of this fluorescent light passes through a second filter or monochromator and reaches a detector, which is usually placed at 90° to the incident light beam to minimize the risk of transmitted or reflected incident light reaching the detector.
Standards FL1–FL6 represent "standard" fluorescent lamps consisting of two semi-broadband emissions of antimony and manganese activations in calcium halophosphate phosphor. FL4 is of particular interest since it was used for calibrating the CIE color rendering index (the CRI formula was chosen such that FL4 would have a CRI of 51). [citation ...
Lamps used for lighting are commonly labelled with their light output in lumens; in many jurisdictions, this is required by law. A 23 W spiral compact fluorescent lamp emits about 1,400–1,600 lm. [4] [5] Many compact fluorescent lamps and other alternative light sources are labelled as being equivalent to an incandescent bulb with a specific ...
Photoluminescence (abbreviated as PL) is light emission from any form of matter after the absorption of photons (electromagnetic radiation). [1] It is one of many forms of luminescence (light emission) and is initiated by photoexcitation (i.e. photons that excite electrons to a higher energy level in an atom), hence the prefix photo-. [2]
Trichromatic fluorescent lamps BaMg 2 Al 16 O 27:Eu(II) Blue 450 nm 52 nm – Lamp Trichromatic fluorescent lamps [34] BAM BaMgAl 10 O 17:Eu,Mn Blue-Green 456 nm,514 nm – – Lamp – BaMg 2 Al 16 O 27:Eu(II),Mn(II) Blue-Green 456 nm, 514 nm 50 nm 50% [34] – Lamp Ce 0.67 Tb 0.33 MgAl 11 O 19:Ce,Tb Green 543 nm – – Lamp Trichromatic ...