New info. I just spoke with Sylvania about DRL bulbs. First, the 4157 LL is just a replacement bulb (long life). Their 3157/4157A ST is a SilverStar high performance bulb and they assure me it's brighter/whiter. It does NOT burn hotter. Their only concern is life. They say it may not last as long as the std bulb.
P.S. TwinPak $24.18 incl shipping/tax
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Jonahs
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