LED_lighting Emergency_vehicle_lighting

police cars sit @ base of i-35w bridge collapse. lightbars mounted on cars led-based. illuminated back-up lamps seen in 2 cars in foreground being used emergency lights operate on different circuit, rather burning steadily indicate cars in reverse gear.



led-lights on volkswagen transporter-ambulance

led-based lighting becoming popular in emergency services several reasons. light-emitting diodes small, solid state, power-efficient, long-lasting (as have no filaments burn out) , can seen @ great distances , in sunlight.

whether lightbars or single beacons, led-based lights typically use clear, colorless dome because light color intrinsic property of leds themselves. led-based lightbars can made thin, reducing wind resistance around 8-10 percent, or made flat , used in novel applications, example flip under sun visor.

led lights used in mode similar conventional strobe lights, can programmed wider variety of flash patterns because of ability switched directly electronics, opposed discharging capacitor through gas-filled tube.

led lights produce relatively little heat when in use. in colder inclement climates, has resulted in led emergency vehicle warning lights (as traffic lights) being obscured buildup of frost or snow, raising safety concerns. solutions being researched provide heat source, necessary in weather conditions, keep led lights clear of snow , frost.