RODALCO
Well-Known Member
Over the last couple of years I have seen quite a few LED traffic lights being installed as replacements for the incandescent traffic lights.
This is in West Auckland, New Zealand
Of course the long lifespan is very favourable ± 100,000 hrs and lower maintenance and powerconsumption.
The very bright and even colour are certainly noticable , so is the instant colour change over.
I have noticed though that some faillures have occured, especially in the orange lights that 4 or 5 LED's have failed.
It could be due to a faulty batch, but it's interesting that the orange LED clusters are mostly affected, although today I noticed a green LED lamp with 3 LED's out.
Question How are these lamps assembled and what size are the dropper resistors? I think that there are circuit design faults in some of those LED lamps. Anyone can post a photo on this forum?
I have used LED's on 240 Volts for years with 2*1 Watt 33 or 39 k Ohm resistors and 1N4007 diode in series and 1N914 antiparrallel with LED in harsh conditions with spikes and NO faillures. (Inom LED is ± 3 to 5 mA).
This is in West Auckland, New Zealand
Of course the long lifespan is very favourable ± 100,000 hrs and lower maintenance and powerconsumption.
The very bright and even colour are certainly noticable , so is the instant colour change over.
I have noticed though that some faillures have occured, especially in the orange lights that 4 or 5 LED's have failed.
It could be due to a faulty batch, but it's interesting that the orange LED clusters are mostly affected, although today I noticed a green LED lamp with 3 LED's out.
Question How are these lamps assembled and what size are the dropper resistors? I think that there are circuit design faults in some of those LED lamps. Anyone can post a photo on this forum?
I have used LED's on 240 Volts for years with 2*1 Watt 33 or 39 k Ohm resistors and 1N4007 diode in series and 1N914 antiparrallel with LED in harsh conditions with spikes and NO faillures. (Inom LED is ± 3 to 5 mA).