To test a headlight bulb, one would first inspect the bulb. If it's not obvious that a filament is broken, testing for resistance across the bulb's two contacts can provide an answer.

In addition to the stock and LED headlights, we also brought along a pair of Philips’ X-tremeVision direct replacement bulbs to see how they would stack up as a low-cost option.

Plug-and-play LED replacements for halogen headlight bulbs are a popular car mod. LEDs often look brighter than incandescent lights, but “looks brighter” and “illuminates better” are not ...