On bikes that use a 1157 tail/brake combination bulb, a simple and inexpensive upgrade in the brake light illumination is readily available.

A 2357 tail/brake combination bulb, available at any auto parts store, will produce the same brightness for the tail light (3 lumens), but will produce 25% greater brightness for the brake light (40 lumens vs. 32 lumens).

The volts required to power the 2357 bulb are the same as the 1157, but there is a slight increase in the amps required (2.1 for the 1157, 2.2 for the 2357). The resulting increase in watts used is only 1.28 watts, or a 4.76% increase over the standard 1157 bulb.

The only draw back to using the 2357 bulb is the rated hours of service for the brake light element is much less (400 hours for the 2357 brake light element vs. 1,200 hours for the 1157 brake light element). The tail light element in both the 1157 and the 2357 are rated at 5,000 hours. Assuming one rides 4 hours per day, 365 days per year and uses his/her brake 25% of the time, if the brighter 2357 bulb is replaced annually, there should be little chance of in-service failure.

Cost for a 2357 bulb is about 97 cents.