On Tue, 23 Apr 2013 16:58:35 +0100, Dave Plowman wrote:

In article ,
Major Scott wrote:
Pulsing an LED is a way of getting a higher light output from it
without overheating. Overheating an LED kills it in short order.

Take for example the brake/tail lights. These are often pulsed for tail
and on for brake. So what you said doesn't make sense. Anything less
than full voltage on (as for brake) will be lower heat.

LEDs are current, not voltage, driven.

When there's a series resistor, then you can think of them as voltage driven. Anyway electronics to lower the current can be made without pulsing.

--
When shagging a goat you are best taking it to the edge of a cliff because they push back harder. -- Billy Connelly