Low power consumption and long and predictable lifetime: The
lifetime of LED street lights is usually 10 to 15 years, three times the life
of current technologies adopted. The much less frequent need to service or
replace LEDs means low maintenance cost.
Quick turn on and off: Unlike fluorescent lamps, which take time
to heat up once switched on, LEDs come on with full brightness instantly.
Unlike mercury vapor, metal halide and sodium vapor lamps (commonly used in
street lighting), LEDs do not have a problem restarting immediately (hot
ignition) following a brief power failure or inadvertent turn off.
Less attractive to nocturnal insects: Nocturnal insects are
attracted to ultraviolet, blue and green light emitted by conventional light
sources.
Fewer electrical losses: All other types of lighting (except
incandescent) require ballasts, additional electronic and/or electromagnetic
components, in which some power is consumed.
Optically efficient lighting equipment: Other types of street
lights use a reflector to capture the light emitted upwards from the lamp. Even
under the best of conditions, the reflector absorbs some of the light. Also for
fluorescent lamps and other lamps with phosphor coated bulbs, the bulb itself
absorbs some of the light directed back down by the reflector. The glass cover,
called a refractor, helps project the light down on the street in a desired
pattern but some light is wasted by being directed up to the sky (light
pollution). LED lamp assemblies (panels) made by reliable Led lights manufacturers do not require reflectors and can be designed to provide the
desired coverage without a refractor.
Higher light output even at low temperatures: While fluorescent
lights are comparably energy efficient, on average they tend to have lesser
light output at winter temperatures.
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