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1x 1142-18 bulb
These bulbs are the brightest available, featuring the latest technology allowing them to run on any voltage between 8v and 30v. It uses 18 Surface mounted high power LEDs

These are a direct fir for your old bulb with 2 contacts and parallel pins. Specs:
360 degree -visible for miles
Electronic current limiting - 8-30 V DC - bi-polarity
Dual contact (positive and negative on the base)
parallel pins
Will work on 12v and 24v systems
Power Consumption: 3w
Warranty: 12months/10000hrs
color range: 5500k (almost pure white)
Type: InGaN White
Continuous Forward Current 100 mA

Length:55 mm
Protrusion out of socket: 35 mm
Diameter on top: 25.0 mm