Soundy | 04-09-2013 08:40 AM | Quote:
Originally Posted by TjAlmeida
(Post 8207384)
Dim as in adjustable dim of the lights. Or when they are shutting down they dim till they are fully off.
The lights in the Dodge dim when I leave the truck and lock it, they dim out slowly. Posted via RS Mobile | The ones that dim gradually until they're out. Quote:
Originally Posted by dhillon09
(Post 8207390)
sometimes when they dim they provide a low voltage, but voltage never completely stops. That voltage isn't enough to power a regular bulb but because LED's are such low power you get a glow coming from the LED's -- almost like ambient lighting but its accidental ... happened in my car, I didn't mind it, so I just left it lol | Not exactly.
The dimming is not accomplished by lowering the voltage, it's done by pulsing the power to the light. Because incandescent filaments build up to full brightness over time (a few dozen milliseconds), and go dark at a similar rate when power is removed, typical light dimmers cycle the power on-and-off quickly - an 80% on/20% off cycle will dim slightly, 50% on/off will dim further, 20% on/80% off will be very dim.
When you do this with LED fixtures that aren't designed for it, you just get a flashing effect until the power shuts off entirely.
It works the same with household dimmers, which is why most don't recommend use with fluorescent lights; this is why if you want to replace those bulbs with CFL or LED, you have to be sure to get the "dimmable" types of bulbs that will compensate for it.
There was a thread about this in a Jeep forum a couple years ago where a guy tried to add some LED footwell lighting to his Patriot and ran into the same issues. Since Jeep is currently made by Chrysler, I would expect your truck to have similar if not identical lighting, and probably suffer from the same problem.
Not saying don't do it, just saying, be aware of the issue and be prepared for it not to work as expected. |