Phillips 631LLB2 Dome Light Bulb

Phillips 631LLB2 Dome Light Bulb Overview

The Phillips LongerLife dome light bulb is built for drivers who want dependable interior lighting and strong value from a replacement bulb. This BA15s-base incandescent bulb uses clear glass construction, 14-volt operation, and a 2C-2R filament design for interior dome light service in a wide range of classic vehicles.

Phillips 631LLB2 is a practical choice for restoring cabin illumination in applications such as Chevrolet Caprice, Chevrolet Camaro, and Ford Mustang interior lighting systems. The LongerLife - Twin Blister Pack line focuses on value-oriented replacement lighting for drivers maintaining older vehicles.

Key Features

• Phillips LongerLife Mini Bulb for interior dome light use
• Clear glass bulb with clear finish for standard cabin lighting output
• Incandescent bulb technology with 14-volt rating
• BA15s bulb base type for listed fitments
• 2C-2R filament type with dual-filament construction
• 8.82-watt, 0.63-amp electrical rating
• Fits a broad range of classic Chevrolet, Ford, Pontiac, Buick, Oldsmobile, Jeep, Lincoln, and Mercury models
• Part number 631LLB2 for catalog and fitment lookup

Product Details

Phillips LongerLife bulbs are positioned for value-focused replacement needs, giving you a straightforward interior lighting solution without changing the original style of the vehicle’s dome lamp setup. The bulb measures 1.44 inches in length and 0.74 inches in diameter, with glass construction and a clear bulb color that matches common OEM-style interior lighting requirements. This part number, 631LLB2, is listed across many model years from 1962 through 1992, including applications for Chevrolet Caprice, Chevrolet Impala, and Ford Bronco.

This part cross-references no listed alternate part numbers in the provided data.

Common Uses

• Restores dim or failed dome light output
• Replaces burned-out interior courtesy lighting bulbs
• Addresses flickering cabin light caused by filament wear
• Returns proper illumination to classic vehicle interior lamps
• Supports maintenance of original-style lighting in older Chevrolet, Ford, and Pontiac models

Installation Notes

Verify the bulb base type, voltage, and physical dimensions before installation. Confirm the vehicle’s original dome light socket uses a BA15s-style bulb and compare the existing bulb to the listed 1.44-inch length and 0.74-inch diameter. For best results, handle the glass bulb carefully and make sure the socket contacts are clean before installing the replacement.

Fitment examples include Fits 1978-1980 Chevrolet Caprice, N/A; Fits 1964-1971 Ford Mustang, N/A; and Fits 1974-1978 Jeep Wagoneer, N/A. Additional listed applications include Fits 1978-1987 Chevrolet Chevette, N/A and Fits 1967-1971 Pontiac Firebird, N/A.

Quality Assurance

Phillips is a recognized lighting brand, and the LongerLife line is described by the manufacturer as a value-oriented bulb family for replacement use. This product is not DOT approved, so confirm local requirements and vehicle application before use.