My Shih Tzu has this light. The neighbors love the action.

It twinkles red, white, and blue.

Just clip it on her collar when we go out at night.

https://www.ebay.com/itm/Small-Aluminum-Dog-Cat-Pet-Safety-Flashing-Flash-LED-Night-Light-Collar-Charm-US-/291944217115?var=&hash=item0

Video of one like in action: