These lights are designed to fit into wine, beer, whiskey, and other liquor bottles. The lights are powered by three LR44 batteries that can last up to 48 hours.

How do bottle lights work?

So how does it work? Simple refraction of sunlight, explains Moser, as he fills an empty two-litre plastic bottle. “Add two capfuls of bleach to protect the water so it doesn’t turn green [with algae]. … Then, from the bottom upwards, he pushes the bottle into the newly-made hole.

How long do LED bottle lights Last?

They are all good and bright for at least 6 hours, which is fine for an average evening’s light, but some seem to keep going for longer; as long as 8 hours at full strength. So far, I’ve used them as a nightlight in a child’s bedroom (no naked flames), as mood lights instead of candles, and as table decorations.