Peterbilt 587 Map Light Bulb Size

Additional Notes

• The Peterbilt 587 uses the 211-2 bulb for the map light across all documented model years from 2011-2018.
• The 211-2 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across manufacturers.
• The 211-2 is a festoon-style bulb, a type characterized by a cylindrical tube with contact points at each end rather than a screw or bayonet base.
• The bulb measures 41mm in length, which is the span between its two end contacts and determines physical fitment within the map light housing.
• It uses an SV8.5 base, a designation that refers to the 8.5mm width of the end caps on a single-contact festoon bulb.
• The 211-2 operates at 12 volts, consistent with the standard electrical system voltage found in commercial trucks.
• The bulb carries a 12-watt power rating, which reflects its energy draw and light output level within the map light application.
• Because the 211-2 is an ANSI-standardized part, equivalent bulbs from different manufacturers sharing the same designation are generally interchangeable, provided they match the 41mm length and SV8.5 base.