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Botts' dots are named after Elbert Dysart Botts, a California Department of Transportation (Caltrans) engineer credited with overseeing the research that led to the development of the markers. [ 2 ] Botts' dots are most commonly white but may be yellow when used to substitute for the yellow lines that divide opposing directions of traffic in ...
As with the case of LED MR lamps, LED PAR lamps generally use an array of individual LED elements that are unsuitable for reflector operation. Nevertheless, some degree of beam control can be obtained with aperture or lens, and LED PAR 38 replacements with a 40° spread is common. Models built for stage lighting may use less similar dimensions.
The company (based in Ennis, Texas) changed its name to Ennis Traffic Safety Solutions and now markets the Stimsonite product line and descendants under the Stimsonite brand. Other manufacturers of retroreflective raised pavement markers sold in the United States under various designs include 3M , Apex Universal, Vialume, and Ray-O-Lite.
Left to right: MR16 with GU10 base, MR16 with GU5.3 base, MR11 with GU4 or GZ4 base Line drawing of an LED MR16 lamp, with a heatsink rather than a reflector. A multifaceted reflector (often abbreviated MR) light bulb is a reflector housing format for halogen as well as some LED and fluorescent lamps.
Reflector, a device that causes reflection (for example, a mirror or a retroreflector) Reflector (photography), used to control lighting contrast; Reflecting telescope; Reflector (antenna), the part of an antenna that reflects radio waves; Reflector (cipher machine), a component of some rotor machines in cryptography
The telescope's dome. The Otto Struve Telescope was the first major telescope to be built at McDonald Observatory.Located in the Davis Mountains in West Texas, the Otto Struve Telescope was designed by Warner & Swasey Company and constructed between 1933 and 1939 by the Paterson-Leitch Company.
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