Please see Quick Start Guide pages below to see what each light location represents. Depending on what the Egg and Cameras are doing, you will occasionally see different colored lights, here is what they mean and some pointers:
Yellow Inside Light with Green Outside Light - Cameras are charging.
Green Inside Light with Green Outside Light - Cameras are charged.
Flashing Red Light - Remove Camera(s) from Egg, unplug from USB charging cable, restart Egg and retry.
Power Button Flashing Blue - Bluetooth ready to pair.
Short press Egg Power Button to view charge status.