A website touting the Sylvania SilverStar headlight bulb says it provides ... in our labs and at our test track. We tested the low-beam performance of single-filament (9003) and dual-filament ...

The problem revolves around the headlight control module, which has been found in certain instances to switch off the low-beam headlights when the high beams are turned on. Needless to say ...

The top of the low beam shining on the wall should be at or slightly below the height of the center of the headlight lens for most vehicles. You should expect the light pattern to be higher on the ...