Frequently Asked Questions About Kenworth W900B/W900L Driving Lights

Will these driving lights fit my specific year and model Kenworth W900?

Most aftermarket driving lights for the W900B and W900L are designed to fit models from 1987 through current production years. However, there are slight variations between the W900B (with the flat hood) and W900L (with the longer hood). Always verify the mounting bracket style matches your specific truck - pre-2007 models often use different bracket spacing than 2007+ models. Check your bumper configuration as well, since day cab and sleeper models may have different clearance requirements.

What's the difference between halogen, LED, and HID driving lights for my W900?

Halogen lights are the most affordable option, typically ranging from 55-100 watts, but draw more power and generate significant heat. LED driving lights offer superior longevity (50,000+ hours), instant-on capability, and lower power consumption, though they cost more upfront. HID lights provide the brightest output but require ballasts and have a warm-up period. For W900 applications, LED lights are increasingly popular due to their vibration resistance and minimal electrical load on older charging systems.

How difficult is the installation process, and what tools will I need?

Installation typically takes 2-4 hours depending on your setup. You'll need basic hand tools, a drill with metal bits for any new mounting holes, wire strippers, and electrical connectors. Most driving light kits include wiring harnesses, but you may need to purchase a relay and switch separately. The main challenges include routing wires through the firewall (usually through existing grommets near the clutch pedal), securing the wiring away from heat sources, and ensuring proper grounding. Professional installation typically runs $150-300 if you prefer not to DIY.

Are chrome or stainless steel housings worth the extra cost?

Stainless steel housings resist corrosion better than chrome-plated steel, especially in salt-belt states, making them worth the 20-30% premium for trucks exposed to harsh conditions. Chrome housings look great initially but can pit and peel after 2-3 years of heavy use. Powder-coated aluminum housings offer a good middle ground - they're lighter weight, won't rust, and cost less than stainless. Consider your operating environment and how long you plan to keep the truck when making this decision.

What size and beam pattern should I choose for highway driving?

For W900B/W900L trucks, 7-inch or 9-inch round lights are most common, with 7-inch being the traditional choice. Beam pattern is crucial - spot beams project light far down the road but create a narrow coverage area, while flood beams spread light wider but shorter distances. Most drivers prefer a combination setup: spot beams on the outer positions for distance visibility and flood or driving beams on the inner positions for peripheral coverage. Avoid lights over 100 watts each if running multiple units, as this can overload stock alternators on pre-2000 models.