Red means stop, green means go... snow means...?
LED Traffic Lights Don't Melt Snow, Cause Danger : Read more
LED Traffic Lights Don't Melt Snow, Cause Danger : Read more
http/en.wikipedia.org/wiki/Light-emitting_diodeHigh power LEDs (HPLED) can be driven at currents from hundreds of mA to more than an ampere, compared with the tens of mA for other LEDs. They produce up to over a thousand [55][56] lumens. Since overheating is destructive, the HPLEDs must be mounted on a heat sink to allow for heat dissipation. If the heat from a HPLED is not removed, the device will burn out in seconds. A single HPLED can often replace an incandescent bulb in a flashlight, or be set in an array to form a powerful LED lamp.