Flashlight battery pack with potted electronics update.

This is an update to the project I did a while ago, where I pottred a light sensor circuit into the end of a cheap torch / flashlight to make a waterproof dusk sensing power supply for garden lights. You can see that project in this video:-
https://www.youtube.com/watch?v=TiZmXa_LrOg

So far there is no sign of water ingress, and the LEDs I used (which I now realise I'd already had outdoors for a while beforehand) are still going strong, with the only sign of corrosion being the very end of the string where it has been cropped at the factory and exposed the bare copper ends.