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Usage includes theatrical lighting, locomotive headlamps, aircraft landing lights, and residential and commercial recessed lights ("cans" in the United States). Many PAR lamps are of the sealed beam variety, with a parabolic reflector , one or more filaments , and a glass or plastic lens sealed permanently together as a unit.
Cross section of a typical fluorescent lamp with and without a reflector. Some lamps have an internal opaque reflector. Coverage of the reflector ranges from 120° to 310° of the lamp's circumference. Reflector lamps are used when light is only desired to be emitted in a single direction, or when an application requires the maximum amount of ...
Best known for production of yellow school buses, the company produces buses for multiple applications; all bodies designed by the company have been produced for cutaway van chassis. Collins was founded in 1967 by Don Collins Sr. as E-CON-O Conversion; [ 3 ] originally a part of Collins Industries, the company exists today as a wholly owned ...
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow.
Lighting systems should be designed with respect to the requirements of the activity to be performed. For instance, lighting over a desk should be different than light required in cafeterias or hallways. [7] Current sustainable design guidelines for schools usually focus only on energy-conserving luminaires with consideration only for visual needs.
Trans Tech is the first school bus manufacturer to produce a fully electric school bus (eTrans, based on the Smith Electric Newton). Van-Con, Inc. Type A Type B 1973 Middlesex, New Jersey: Van-Con, Inc. is New Jersey's only school bus manufacturer. Van-Con, Inc produces 16, 25, 30 passenger and wheelchair accessible school buses.
A broken fluorescent tube will release its mercury content. Safe cleanup of broken fluorescent bulbs differs from cleanup of conventional broken glass or incandescent bulbs, avoiding the use of vacuum cleaners, in favour of sticky tape to recover small particles, and ensuring that fans and air conditioning are turned off.
School bus with door open, red warning lights and deployed stop arm. Around 1946, the first system of traffic warning signal lights on school buses was used in Virginia, consisting of a pair of sealed beam lights. [citation needed] Instead of colorless glass lenses (similar to car headlamps), the warning lamps utilized red lenses.
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