The International L122 uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1950 to 1952 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International L122 uses the H6024 bulb size across both the high beam and low beam headlight positions for the 1950-1952 model years.
The H6024 is an ANSI-standardized sealed beam unit used in the United States and Canada, meaning the lens, reflector, and filament are fused into a single glass assembly rather than housing a separate replaceable bulb inside.
When a sealed beam unit fails, the entire H6024 assembly is replaced as one piece, as no internal bulb is accessible or serviceable on its own.
The H6024 unit operates on a 12-volt electrical system, which aligns with the standard automotive voltage adopted broadly during this period.
The H6024 follows the 7-inch round sealed beam format, a size class that was regulated under ANSI standards and shared across many North American vehicle applications of that era, which contributed to broad parts availability.
Because the International L122 (1950-1952) uses the same H6024 specification for both high and low beam positions, the vehicle does not use separate dedicated bulbs for each function; the sealed beam unit itself contains the filaments for both beam modes.