Luminescence for LEDs

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Oct 17, 2015, 5:33:30 PM10/17/15
to SolarCarTeams

While in the regulations it mentions the visibility distance for blinkers to be 30 meters, does anyone know what the actual luminescence value is of the reference LEDs? 


Evan Stumpges

Oct 18, 2015, 2:16:36 PM10/18/15
to SolarCarTeams
As someone who has helped inspect solar car lights during Scrutineering in the past, I would strongly suggest that teams buy at least one red and amber reference light to use when determining whether your lights are bright enough or not. Unfortunately, it's not as simple as just getting a lumens value on the LEDs you plan to use. We've had a lot of problems in recent events with teams bringing lights that are acceptable when viewed straight on but woefully inadequate at the required 30 deg angle. Sometimes this is due to the LEDs themselves not having good off axis brightness but other times it is due to the cover over the lights or the mounting angle of the lights. Many teams choose to use the reference lights as their actual lights since they are small and fit quite well on a solar car leading/trailing edge.


20 LED (Length 3.35 in)
Item TF20 from Custom Dynamics
Red lights are Red LED with Red lens
Amber lights are Amber LED with Amber lens 

Tyler Coffey

Oct 18, 2015, 2:25:09 PM10/18/15

An even better option to ensure compliance would be to get a set of slightly larger TF25 or TF30 modules. That way if the voltage on your lighting system ends up being slightly lower than the reference voltage, you are still brighter than the ref standard.

Tyler Coffey
ASC Driver Inspector

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