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FMVSS 108 is codified in Title 49 of the Code of Federal Regulations Part 571, Section 108. [1] The most recent version was published by NHTSA for comment in December 2007, [2] and since then, it has been amended in April 2011, [3] August 2011, [4] January 2012, [5] December 2012, [6] December 2015, [7] February 2016, [8] and February 2022.
For this reason, LED signal lights must remain compliant with the intensity requirements for the functions they produce after one minute and after thirty minutes of continuous operation. [146] In addition, UN Regulation 112 contains a set of tests for LED modules, including colour rendering, UV radiation, and temperature stability tests.
Bulbs used for headlamps, turn signals and brake lamps may be required to comply with international and national regulations governing the types of lamps used. Other automotive lighting applications such as auxiliary lamps or interior lighting may not be regulated, but common types are used by many automotive manufacturers.
The engine power output is the same as the civilian versions, at 124 wheel horsepower and 99.9 wheel foot lbs of torque. The US versions are the newer 6 speed motorcycles with LED lighting. Multiple jurisdictions have tested and switched to the motorcycle for its comfort, handling, acceleration, and factory integrated controls of police equipment.
Headlight flashing might have come into more common use as a means of attempting driver-to-driver communication by the mid-1970s, [3] when cars began to come with headlight beam selectors located on the steering column—typically activated by pulling the turn signal stalk—rather than the previous foot-operated pushbutton switches.
The four bulb Beacon Ray Model 175 with a clear dome and colored lenses over the bulbs were used extensively in the 1960s by the NYPD with two red bulbs alternated with a white bulb and an amber bulb canted upwards at a 45-degree angle so the amber flash would reflect off upper-floor building windows for added traffic attention/visibility.