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LED Signal Lamps
Eric, while I have not used those particular ones, almost every trailer (and most truck) tailights in the fleet have been changed over to LED lights in those rubber boots.
If it's possible, I will never put another incadescent bulb on a (big) truck or trailer again.
IMHO, the big reason they are so durable is a two-fold things, first the rubber boot mounting gives it amazing isolation from both vibration and impact, a bump that would break a 'normal' light just moves this style in the rubber boot. Secondly the LED bulb itself is much less subject to the two things that kill bulbs, vibration and on/off cycles.
I don't think we've had to replace an LED light yet.
They also reduce the current draw dramatically, we can run several LED tailights and still only pull a fraction of the current the old bulbs did.
Best of luck.
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LED Signal Lamps
The lights we use are typicaly 3 times the cost of a 'regular' light.
However, as I mentioned the durability is unmatched.
An extra $20 for a light, $30 instead of $10, is a pitance to me if I spend $40 in parts & labour during the life of the 'normal' light in broken lenses and bulbs and changing same.
Not to mention the savings by not even getting stopped, let alone any tickets for having burned out tailights.
Best of luck.
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LED Signal Lamps
I think the confusion here is the electrical theory itself.
An LED does NOT need a specific voltage, it GIVES a specifc voltage drop, IE about 3.6 volts per LED, and unless you want a VERY short LED life cycle, you must not run them at much more than 20 or 25 ma (milliamps). You can run them much higher, but you won't get the long life that gives you the economy.
So, there is no need, nor do they put, a transformer on them, they have a CURRENT limiting circuit on each one though, to prevent them burning up.
They run several LED's together in series, or several series cicuits run in parallel with each other to create the circuit voltage and current draw that will work best.
For instance, with a voltage drop of 3.6 volts per LED, if you connected 4 together in series, you would have a 14.4 volt drop in the ciurcuit, in a vehicle the normal charging circuit voltage is 14.8 volts, so you would have an almost dead on setup.
Best of luck.
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