Freightliner Cascadia Fog Light Bulb Size

Additional Notes

• The front fog light position on the Freightliner Cascadia uses the H11 bulb across all listed model years from 2008-2022, making it the sole bulb type present in these specifications.
• The H11 is a single-filament halogen bulb, meaning it contains one tungsten filament and produces light through the halogen cycle, which redeposits evaporated tungsten back onto the filament to extend its operational life.
• The H11 operates at 12 volts and 55 watts, placing it in the standard low-power range typical of halogen fog light applications.
• The H11 uses a PGJ19-2 base, which is a specific locking connector type. Bulbs with different base designations within the H-series, such as H8 or H9, are not physically interchangeable with H11 sockets despite sharing a similar appearance.
• The H11 carries ECE certification, the regulatory standard used across Europe and many other markets worldwide, and also holds approval for use in the United States, giving it broad regulatory acceptance across major automotive markets.
• The Freightliner Cascadia (2008-2022) front fog light position consistently requires the H11, so replacement bulbs must match the PGJ19-2 base type to fit the socket correctly.