LED problems
Recently bought 4 new LED bulbs to replace the incandecent ones for interior lighting in a truck camper. They are the wedge type 921 bulbs. The problem is they shut down after about 15-20 minutes. The...
Forum Discussion
happycamper002 wrote:AidenJ wrote:
Recently bought 4 new LED bulbs to replace the incandecent ones for interior lighting in a truck camper. They are the wedge type 921 bulbs. The problem is they shut down after about 15-20 minutes. They will come back on after a short time, but then go back off. All 4 do the same and it doesn't matter what fixture I put them in. Any ideas?
You did not say that this happened when you are plugged in to shore power. I'm assuming the possibility that you could have 13.7v (as another poster had alluded) being fed to the lights which means you are plugged in to pedestal. (you couldn't have 13.7 vdc coming from the batteries unless your alternator is running).
Feel the LEDs when lit after a few minutes. If hot (not just warm) you are getting over 12.5v of power. I've seen 19.0 volts at the fixture when plugged in to pedestal. Quality made LEDs can withstand this above average power source. The cheap ones don't go thru a rigorous quality control. . . and eventually fail in a very short period. Maybe overnight.
SOLUTION:
Hookup a 67 ohm (plus or minus) 1 watt resistor in series with the light fixture . Even when you run your rig from house battery at nominal 12 volts, there would be no noticeable reduction in output lumens. With this approach your LEDs will most likely outlive you. :-)
Do this at each individual fixture, not at the fuse box because some loads are connected to the same circuit the fixtures are. . . and they may not function correctly like sensitive electronics, fans and solenoids etc.
19 volts when on shore power????? :E :E :h
YOU have a BIG PROBLEM!!!
There is no way or reason as to why ANY MODERN "12V" battery system should or could get to 19V when the converter AND battery are functioning correctly!
I call BS..
Now 14.4V-14.8V is a real possibility but not 19V.
The only possible reason you could have ever seen that voltage (19V) is if you have an old school analog converter with a big old heavy brute transformer which required a GOOD battery.. The battery would regulate the voltage and battery WAS required at all times..
As far as the OPs problem..
SEND THE LEDS BACK AND GET YOUR MONEY BACK!
You most likely bought at junk prices and junk you got..
Buy somewhere else (and hopefully a better quality).
