Suzuki Motorcycle SFV650 Parking Light Bulb Size

Additional Notes

• The W2.1x9.5d base is the standard wedge-type base used across T10 miniature bulbs, relying on friction and spring tension from the socket rather than a locking mechanism to maintain contact.
• The 12961 is a Philips part number designating a T10 miniature wedge bulb operating at 12 volts and 5 watts, consistent with low-draw parking light applications.
• The Suzuki Motorcycle SFV650 uses the 12961 bulb for its parking light across the 2013-2015 model years.
• The T10 designation refers to a tubular bulb with a width of 10 thirty-seconds of an inch, a form factor widely used in parking, position, and courtesy light roles across many vehicle types.
• At 5 watts on a 12-volt circuit, the bulb draws approximately 0.42 amperes, placing it within the low-current range typical of indicator and position lighting rather than primary illumination.
• The W2.1x9.5d base specification defines both the contact pin width at 2.1 millimeters and the insertion depth at 9.5 millimeters, which governs physical fitment into the socket housing.
• Because the 12961 is a manufacturer-specific part number from Philips, equivalent bulbs from other manufacturers must match the T10 form factor, W2.1x9.5d base, 12-volt rating, and 5-watt output to be considered interchangeable.