Polaris 500 Tail Light Bulb Size

Additional Notes

• The 194 bulb is the tail light specification for the Polaris 500 across the 1989-2005 model years, making it the predominant bulb type in these specifications.
• The 194 is a miniature wedge bulb classified under the T10 form factor, operating at 12V with a power draw of 3.78W, placing it in the low-wattage range typical of parking and marker light applications.
• The 3157 bulb is specified for the 2006 Polaris 500, representing a distinct departure from the 194 used in prior years.
• The 3157 is a dual-filament wedge bulb classified under the T25 form factor, operating at 12V with a split wattage rating of 27W on the high filament and 7W on the low filament, a configuration associated with combined stop and tail light functions.
• Both bulb types conform to ANSI standards applicable in the United States and Canada, indicating standardized electrical and physical specifications within those markets.
• The T10 and T25 designations refer to the tubular width of each bulb, with T25 being physically larger than T10; the two types are not interchangeable due to differences in size, wattage, and filament count.
• The shift from a single-filament 3.78W bulb to a dual-filament 27W/7W bulb between the 2005 and 2006 model years reflects a change in the tail light assembly's electrical requirements.