Dodge Ram 1500 Dome Light Bulb Size

The Dodge Ram 1500 dome light requires specific bulb sizes 578 or 579 or 211-2 depending on the specific version of the vehicle. Available data covers a range from 1995 through 2010 for the components listed in the provided specifications.

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

Bulb Size by Year Range

Years	Bulb Size
2005-2010	578
2004	579
2003	578
1998-2002	579
1995-1996	211-2

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V, 12W.	578
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	579
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2

Other Locations

Additional Notes

The Dodge Ram 1500 dome light specifications cover model years 1995-2010 and reference three distinct bulb sizes: 578, 579, and 211-2.
All three bulb types in these specifications are festoon-style bulbs, meaning they mount horizontally between two spring-loaded contacts at either end of a fixed-length housing.
The 578 bulb is the most frequently specified across these model years, covering the 2003 and 2005-2010 Ram 1500 dome light positions.
The 578 operates at 12V and 12W, with a 41mm length and end-cap contacts, and carries ANSI standardization for the US and Canadian markets.
The 579 bulb shares the same 12V and 12W electrical rating as the 578 but has a 44mm length, making the two physically non-interchangeable despite their identical power draw.
The 579 is specified for the 1998-2002 and 2004 Ram 1500, meaning a 578 or 211-2 bulb would not seat correctly in those fixtures due to the 3mm length difference.
The 211-2 bulb matches the 578 in length at 41mm and in electrical rating at 12V and 12W, but uses an SV8.5 base rather than plain end-cap contacts, which represents a different mounting interface.
Because the 211-2 uses an SV8.5 base, it is not a drop-in substitute for the 578 even though both share a 41mm length, as the contact design differs between the two.
The 211-2 is specified for the 1995-1996 Ram 1500 dome light, reflecting a different fixture design used in those earlier model years.
All three bulb types conform to ANSI standards applicable in both the United States and Canada.