Instrument / pilot (parking) bulb type 6v / 12vbayonet LED, negative or positive earth (non polarity), Ba9s base (single filament) T11 bayonet LED, white.. Replace original instrument bulb or pilot (parking) light and save at least 1/2 amp compared to a normal 3cp (3w) bulb. Warm white 4300K approx 100LM, 0.42W. . Bulb has Ba9s mcc base (aka Type 51).max width 11.4mm, max height 30mm, base 9mm