This is one of the miniature LED lamps that was originally intended as an LED alternative to quartz capsule lamps, but has since found it’s way into other bases like the SES one in this video.
The whole thing is potted in silicone to insulate it and help dissipate the heat from the 64 LEDs. The power rating is a surprising 3W for such a small package and it does meter out at 3W.
The circuit layout is minimalist due to the lack of space, with the most notable featured being the two 330nF SMD caps in parallel and the very symmetrical arrangement of the diodes and inrush limiting resistors.
The LEDs are wired as two series circuits of 32 LEDs and a resistor, both wired in parallel across the minimalist capacitive dropper and rectifier.
Post time: Jan-10-2017