This is a Calex Filament LED Pilot lamp a compact 26x58mm bulb perfect as a direct replacement for the Calex Incandescent Goldline Series. This pilot LED bulb has a Small Edison Screw base-type and emits a 2100 Kelvin Very Warm White light output creating a warming glow and the LED filament creates the resemblance of a incandescent lamp. This model has a 15000 hour lifetime predicted and has been designed with a 1.9 second warm up time.