Ford L8513 Headlight Bulb Size

Additional Notes

• The Ford L8513 (1996-1998) supports three distinct headlamp configurations: two round headlamps, composite headlamps, and four rectangular headlamps. Each configuration requires a different bulb type for both high and low beam functions, and the correct bulb is determined solely by which headlamp system is installed on the vehicle.
• The H6024 is a 7-inch round sealed beam unit operating at 12V. It serves as both the high beam and low beam bulb in the two round headlamp configuration, as the entire unit handles both functions. Being a sealed beam, the lens, reflector, and filament are fused into a single assembly, meaning the whole unit is replaced rather than an internal bulb.
• The 9007 is a dual-filament halogen bulb with a PX29t base, rated at 12V with a 65W high beam filament and a 55W low beam filament. Its dual-filament design allows a single bulb to serve both high and low beam functions within the composite headlamp housing across all three model years covered by these specifications.
• The H4651 and H4656 are both 4x6-inch rectangular sealed beam units operating at 12V. Like the H6024, neither contains a replaceable internal bulb; the entire sealed assembly is the serviceable component. In the four rectangular headlamp configuration, the H4651 is designated for high beam positions and the H4656 for low beam positions.
• All four bulb types listed in these specifications conform to ANSI standards recognized in both the United States and Canada, placing them within a standardized sizing and performance framework common to North American automotive lighting.
• The composite headlamp configuration is the only one among the three that uses a halogen technology bulb with a separable base. The two round and four rectangular configurations both rely on sealed beam technology, which predates the widespread adoption of replaceable-bulb housings in commercial vehicle lighting.
• Because the high beam and low beam positions in the four rectangular headlamp configuration use different sealed beam part numbers (H4651 and H4656 respectively), the two unit types are not interchangeable between positions despite sharing the same physical 4x6-inch form factor.
• The bulb specifications for the Ford L8513 remain identical across the 1996-1998 model years for all three headlamp configurations, with no variation in bulb type between any of those years for either the high beam or low beam positions.