Lifetime of High Intensity LEDs

They get the electroshock therapy.. D from BC

Who gets the pleasure of hooking them to the machine? Do they have to shave them to get the electrodes to stick?

Only licensed Eskimos hook up the polar bears...Haven't seen it done. The bi-polar bears try to walk in both directions...After a zap..they go in one direction.. :) D from BC

That's not bi-polar, just drunk. ;-)

The only polar bear I've seen up close was when I landed at the Fairbanks airport in 1973. After you came down the ramp and walked around the corner onto their main concourse it was in the middle of the arch. I wonder if anyone with a bad heart ever had an attack when they turned and saw it?

Ft. Greely had a twice a year buffalo migration, right through the base. I lucked out and never had to work the shovel brigade. :)

The polar bear is one of the few animals that will stalk and eat humans.

John

I wouldn't want to play "who has the biggest teeth" with a Kodiak either although supposedly they will usually avoid humans. Still, I talked to one guy who had a Kodiak climb on the boat where he and his father were sleeping after hauling up a load of salmon. The bear decided they were his salmon.

The conversation is interesting, so i googled for some specifications:

All of which pretty much follow the Institute of Traffic Engineers reacommended standards.

That bear's still there. I saw it last year, scary as ever.

Cheers, James Arthur

I'll bet that it has scared the crap out of plenty of little kids and old ladies in the last 30+ years. :)

I read the NY file. I saw a lot of non-specific information and nothing that related to life expectancy of the LEDs just that they meet some environmental conditions. Did you find a reference to LED life and actual testing conditions?

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Wait a minute here, please. At first, I thought you were talking about a live, maybe wild, bear wandering around on the tarmac. Now, it sounds kind of like you're talking about a stuffed, mounted, bear statue, like the stuffed, mounted, black bear statue in the Black Bear Lounge of the Hotel Duluth.

???

But, good job on evading scooper detail! :-)

Cheers! Rich

There are a few stuffed Kodiaks in stores in Kodiak City which will definitely cause a few gulps.

Ouch---one failure mode of LED traffic signals is that they don't generate any heat, so they get snow-logged easily. In a snowstorm, the snow deposits everywhere, even onto vertical surfaces such as the signal lenses---incandescents tend to melt off the snow off, but LEDs don't.

I don't think that's as much of a factor with railroad level crossing lights. Even a fairly busy commuter train line only gets a handful of trains per hour, so the duty cycle is going to be very low.

Best regards, Spehro Pefhany