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The concept for an embedded pavement flashing light system was conceived by pilot Michael Harrison in Santa Rosa, California, in 1992 after a friend was involved in a pedestrian accident. [1] He based it on his experience with airport runway lights embedded in the pavement, Mr. Harrison went on to found Lightguard Systems. [2]
The most common type of floodlight was the metal-halide lamp, which emits a bright white light (typically 75–100 lumens/Watt). Sodium-vapor lamps are also commonly used for sporting events, as they have a very high lumen to watt ratio (typically 80–140 lumens/Watt), making them a cost-effective choice when certain lux levels must be provided. [4]
A 230-volt LED filament lamp, with an E27 base. The filaments are visible as the eight yellow vertical lines. An assortment of LED lamps commercially available in 2010: floodlight fixtures (left), reading light (center), household lamps (center right and bottom), and low-power accent light (right) applications An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally ...
A motion detector attached to an outdoor, automatic light. A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection).Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area.
The special cathode can deliver 2 mA of current instead of the 0.3mA of normal cathodes, [467] [466] [229] [167] which makes them bright enough to be used as light sources for projection. The high anode voltage and the specially made cathode increase the voltage and current, respectively, of the electron beam, which increases the light emitted ...
The Mandela Catalogue is an analog horror web series created by American YouTuber Alex Kister in 2021. It is set in the fictional Mandela County, Wisconsin that is invaded by demonic, otherworldly entities called "alternates" that psychologically torture their victims with the ultimate goal of assuming their identities as " doppelgängers ".