I want to keep an eye on Saetta (my little dog) while she runs around in the dark hounding wild rabbits.

After an unsuccessful attempt to use a cheap LED bicycle backlight (it turned off continuously while dog rolling on the ground or simply jumping ditches) I created this robust enclosure.
The power switch is placed in a protected position so it cannot be accidentally activated.

Good battery durability (2 AAA size alcaline)

You can customize IT with different LED colors . I used 2 blue and 2 green.

Supplied clip is designed to fit JULIUS K9 harness but you can design your own or use none simply sticking a VELCRO on the back.

Battery holder idea taken from https://www.thingiverse.com/thing:128069