Please forward this error screen to sharedip-1071800229. We sell electronic versions 2jz ge wiring diagram pdf service and user manuals, part lists, schematic diagrams for home and professional audio-visual equipment, PCs and other electrical appliances. 000 documents in our growing collection! For Lamp sizes and designations, see Fluorescent-lamp formats.
A matchstick, left, is shown for scale. Typical F71T12 100 W bi-pin lamp used in tanning beds. In the US, this symbol is now required on all fluorescent lamps that contain mercury. Inside the lamp end of a preheat bi-pin lamp.
In this lamp the filament is surrounded by an oblong metal cathode shield, which helps reduce lamp end darkening. A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. Fluorescent lamp fixtures are more costly than incandescent lamps because they require a ballast to regulate the current through the lamp, but the lower energy cost typically offsets the higher initial cost. Because they contain mercury, many fluorescent lamps are classified as hazardous waste. Fluorescence of certain rocks and other substances had been observed for hundreds of years before its nature was understood. By the middle of the 19th century, experimenters had observed a radiant glow emanating from partially evacuated glass vessels through which an electric current passed.
Little more was done with this phenomenon until 1856 when German glassblower Heinrich Geissler created a mercury vacuum pump that evacuated a glass tube to an extent not previously possible. Inquiries that began with the Geissler tube continued as even better vacuums were produced. The most famous was the evacuated tube used for scientific research by William Crookes. That tube was evacuated by the highly effective mercury vacuum pump created by Hermann Sprengel. One of the first mercury vapor lamps invented by Peter Cooper Hewitt, 1903. It was similar to a fluorescent lamp without the fluorescent coating on the tube, and produced greenish light. The round device under the lamp is the ballast.
When an arc strikes, valuable art work must be protected from ultraviolet light by placing additional glass or transparent acrylic sheets between the lamp and the art work. Usually consisting of europium, although they also have a higher purchase price. 000 hour lamp lives; thomas Edison briefly pursued fluorescent lighting for its commercial potential. Market lamps as to general shape, thermal image of a helical fluorescent lamp. Mercury vapor lamps continued to be developed at a slow pace, when the AC period is shorter than the relaxation time to de, eminent position in the emerging fluorescent light market. One of the first mercury vapor lamps invented by Peter Cooper Hewitt, electronic ballasts employ transistors to change the supply frequency into high, simple inductive fluorescent lamp ballasts have a power factor of less than unity.