You can see a candle light from 48 km (30 mi) on a clear da…
You can see a candle light from 48 km (30 mi) on a clear dark night.
That is the limit of the human visual system.
https://en.wikipedia.org/wiki/Sense#General
You can see a candle light from 48 km (30 mi) on a clear dark night.
That is the limit of the human visual system.
https://en.wikipedia.org/wiki/Sense#General