For automotive interior lighting application such as : Illumination of the vanity mirrors inside the sun-visors / indicator lamps / illumination of switch / illumination of instrumentation panels / etc ...
Various specifications are available
Bulbs compatible with standard IEC socket type W2x4.6d Optional colored silicon cap ( fitted on the bulb) can also be offered
Rk : The ECE-R37 W2.3W is also available for specific exterior lighting application such as compact (thin) Center High Mounting Stop lamp systems.