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In case you were curious what’s inside a smart IoT lightbulb 
The PCB is essentially a power supply, with the WiFi module plugged into it (FCC ID TE7LBM100). The antenna portion sticking out will stick up through that rectangular whole in the LED portion, along with the power wires.
This smart bulb is one that allows shades of white (different color temperatures), so it mixes two types of LEDs, and has two power wires (plus ground) controlled by the WiFi module.
On the backside are the UART pins nicely labeled Tx and Rx for me, so hooking up the serial console will be the next step
Note: that round bit holding the LEDs is not a fiberglass PCB (poor conductor of heat), but is made from aluminum that conducts heat REALLY well when you hold it while unsoldering the three power wires burning your fingers.
Not picture here is how they poured heat conductive silicon rubber into the entire stem, completely covering the circuit board, leaving only the antenna portion sticking out. Various messy removing it, got bits and pieces everywhere.
