Chevrolet Bel Air Headlight Bulb Size

Chevrolet Bel Air high beam and low beam headlight bulbs utilize sizes H5001, H6024, and H6006, with specifications varying by model generation and bulb size requirements. The replacement chart covers 1950 through 1975 production years with corresponding bulb size data for each vehicle generation.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

High Beam Headlight

Years	Bulb Type	Shop
1958-1975	H5001	Check Price
1955-1957	H6024	Check Price
1950-1954	H6006	Check Price

Low Beam Headlight

Years	Bulb Type	Shop
1958-1975	H5006	Check Price
1955-1957	H6024	Check Price
1950-1954	H6006	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). 4-inch square sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5001	Check Price
ANSI standard (US & Canada). 7-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6024	Check Price
ANSI standard (US & Canada). 5x7-inch rectangular sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H6006	Check Price
ANSI standard (US & Canada). 5.75-inch round sealed beam unit. Not a replaceable bulb — the entire unit is replaced. 12V.	H5006	Check Price

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Additional Notes

The Chevrolet Bel Air uses three distinct sealed beam bulb types across its high beam and low beam headlight positions from 1950 through 1975, with each type defined by a specific physical format under ANSI standards recognized in both the United States and Canada.
The H6006 is a 5x7-inch rectangular sealed beam unit operating at 12V. It serves both the high beam and low beam positions on the Bel Air from 1950-1954, making it the earliest bulb type in these specifications.
The H6024 is a 7-inch round sealed beam unit operating at 12V. It covers both the high beam and low beam positions for the 1955-1957 model years, functioning as a single unit that handles both lighting roles simultaneously.
From 1958-1975, the Bel Air transitions to a split high beam and low beam system using two separate bulb types. The H5001, a 4-inch square sealed beam unit at 12V, handles the high beam position, while the H5006, a 5.75-inch round sealed beam unit at 12V, handles the low beam position.
All four bulb types in these specifications are sealed beam units, meaning the reflector, lens, and filament are fused into a single assembly. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H5001 high beam unit is notably the smallest format in these specifications at 4 inches square, while the H6024 round unit at 7 inches represents the largest single-unit format listed.
The shift from the H6024 single-unit design in 1957 to the paired H5001 and H5006 system in 1958 reflects a change in headlight housing configuration, as the four-headlight arrangement that became common in that era required smaller individual units to fit within the revised front fascia.
All sealed beam types listed carry the H-prefix designation, which indicates compliance with ANSI standardized headlamp specifications, a system that defined interchangeable sealed beam formats across multiple vehicle manufacturers during this period.