Quote:
Originally Posted by Old Tele man
Question now is: will they STAY bright for a reasonable length of time before failing?
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The phosphor will degrade in a high power application like car headlights where things get quite hot, but it should be good for a few thousand hours before losing 30%-50% of its light output, dependent on specific circumstances like ambient temp, which bulb you buy, etc.. At which point, it would become only as bright as an OEM bulb.
I definitely noticed that the highway mpg would go down by a tiny bit when turning on the OEM lightbulbs, but I imagine the fuel savings won't really pay for the bulb. The more important thing is that you get a brighter bulb that doesn't hog electricity and doesn't burn out quickly and abruptly. JDM Astars have a good beam pattern that let you see out in the distance without blinding traffic and correctly advertised lumens rating, and you can get the same bulb from their OEM for I think 100 bucks on Ebay, that's the one to get.