My wife bought some of these and they are actually pretty cool but expensive for what they are.
The operation is there are 6 LEDs on long leads from a small plastic box and 3vdc coming in
Each light comes on and dims out like it was on a capacitor for about
3-5 seconds.The cycle time is pretty slow, maybe 15- 20 seconds each and somewhat random.
What's in the box? I am thinking the simplest relaxation oscillators possible firing a shot every now and then but how do they get the delay off? There is not much room for capacitors.