Oldsmobile Delta 88 Dome Light Bulb Size

Additional Notes

• The Oldsmobile Delta 88 dome light specifications span from 1965 to 1991, covering seven distinct bulb types across that period.
• The 211-2 is the most frequently specified bulb in these records, appearing in nine model years across 1965-1984. It is a 41mm festoon bulb with an SV8.5 base, rated at 12V and 12W under the ANSI standard.
• The 212-2 shares the same 41mm length, SV8.5 base, 12V, and 12W rating as the 211-2. Despite their near-identical specifications, they are catalogued as separate ANSI part numbers, and fitment records for the Delta 88 treat them as distinct, non-interchangeable units.
• The 561 and 562 are both 44mm festoon bulbs with end-cap contacts, rated at 12V and 12W. Like the 211-2 and 212-2 pairing, these two share identical published electrical and physical specifications yet are listed under separate ANSI designations, and the Delta 88 records do not treat them as interchangeable.
• Festoon bulbs as a category dominate the Delta 88 dome light fitment history. The 211-2, 212-2, 561, and 562 together account for the majority of model years in these specifications.
• The 906 is a T10 miniature wedge bulb rated at 12V and 8W, and it appears only in the 1991 model year. Its wattage is lower than all festoon types listed in these specifications.
• The 161, specified for the 1971 Oldsmobile Delta 88, is also a T10 miniature wedge bulb but is rated at only 1W, making it the lowest-wattage bulb in these records by a substantial margin.
• The 1004, specified for the 1966-1967 Delta 88, is a dual-filament bulb with a BAY15d bayonet base, rated at 12V and 21/5W. Its bayonet mounting style and dual-filament construction differ fundamentally from every other bulb type in these specifications.
• The 1004 is noted as a variant of the 1157. The 1157 is a widely used automotive bulb, though the 1004 carries its own distinct ANSI designation and wattage rating.
• Because the Delta 88 dome light has used T10 wedge, festoon, and bayonet base bulb types across different model years, the physical socket type varies by year and bulbs from one era are not mechanically compatible with sockets from another.