Which Headlight Conversion Is Brightest for the Chevy S10

let's look at the standard halogen setup. The S-10 originally came with sealed beam units or composite housings using 9004 or 9007 halogen bulbs. These produce a warm, yellowish light that typically outputs around 1,000 to 1,200 lumens on low beam. The technology is simple: a tungsten filament heats up and glows, producing light as a byproduct of heat. The advantage? Halogens are cheap, widely available, and have a predictable beam pattern when used with factory reflectors. However, they are inefficient—roughly 80% of their energy is wasted as heat. They also suffer from significant lumen depreciation over time, meaning your already dim headlights get even dimmer as the bulbs age.
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