"Dave Plowman (News)" wrote in message
...
In article ZSjtj.725$0%3.218@trnddc06,
James Sweet wrote:
They're pulse driven to give multiple brightness levels. Low as markers,
then they get bright when the brakes are activated. It has nothing to do
with increasing the max brightness.

Eh?



What?

The lights I'm talking about are used in lieu of twin filament incandescent
lamps for tail/brake lights. These have two brightness levels, and to
achieve that with LEDs they use PWM dimming to give two levels.