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ANSI № 3157 PR27/7W WU2.5x16 2 12 V: 27 / 7 W Red PY27/7W WX2.5x16q 2 12 V: 27 / 7 W Amber ANSI № 3757A R5W BA15s 1 6 V, 12 V, 24 V: 5 W Old designation: R19/5 RR5W BAW15s 1 12 V & 24 V: 5 W Red R10W BA15s 1 6 V, 12 V, 24 V: 10 W Old designation: R19/10 RR10W BAW15s 1 12 V & 24 V: 10 W Red RY10W BAU15s 1 6 V, 12 V, 24 V: 10 W Amber T1.4W P11.5d
The bulb is cared for by the Centennial Light Bulb Committee, a partnership of the Livermore-Pleasanton Fire Department, Livermore Heritage Guild, Lawrence Livermore National Laboratories, and Sandia National Laboratories. The Livermore-Pleasanton Fire Department plans to house and maintain the bulb for the rest of its life, regardless of length.
Other sizes with a data sheet in IEC 60064 are A50, A55, A67, A68, A71, A75, and A80. Another common A-series light bulb type is the A15 bulb which is commonly used in the US for appliances and ceiling fans. The A15 bulb is 15 ⁄ 8 in (1 + 7 ⁄ 8 in; 48 mm) wide at its widest point and 3.39 inches tall.
Also within the bulb were metal sculptures coated with phosphors. These phosphors fluoresced when excited by glow discharge. Because glow discharge occurs readily at 110-120 volts AC, one could use these bulbs in standard household lamps in the United States. The phosphors used in the bulbs were somewhat brittle, necessitating care in handling.
Non-conforming light bulbs are being gradually phased out. Since July 2013, bulbs ranging from 61 to 100 watts which do not perform accordingly can no longer be produced or imported, but they could be sold until mid-2014. [126] Since the end of June 2016, incandescent bulbs have been completely prohibited in Brazil. [127]
Diagram of a high-pressure sodium lamp A high-pressure sodium lamp, Philips Master SDW-T 100W. Various types of chemistry are used in the arc tubes of HID lamps, depending on the desired characteristics of light intensity, correlated color temperature, color rendering index (CRI), energy efficiency, and lifespan.
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