LED-based lighting is becoming very popular in the emergency services
for several reasons.Light-emitting diodes are small, completely solid
state, very power-efficient, long-lasting (as they have no filaments to
burn out) and can be seen very easily even at great distances and in
sunlight.
Whether as lightbars or single beacons, LED-based lights typically use a
clear, colorless dome because the light color is an intrinsic property
of the LEDs themselves. LED-based lightbars can be made very thin,
normally called them super-thin LED light bar,LED
lights are often used in a mode similar to conventional strobe lights,
however they can be programmed with a wider variety of flash patterns
because of their ability to be switched directly by electronics, as
opposed to discharging a capacitor through a gas-filled tube.
LED lights produce relatively little heat when in use. In colder
inclement climates, this has resulted in LED emergency vehicle warning
lights (as well as traffic lights ) being obscured by the buildup of
frost or snow, raising safety concerns. Solutions are being researched
to provide a heat source, as necessary in certain weather conditions, to
keep LED lights clear of snow and frost.
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