Imagine sharing a bathroom, not with just your family, but with most of the crew and passengers aboard the ship. And no porthole in the bathroom--just a place to hang the lantern. Once the doorway was shut in that tiny facility, light couldn't seep in except through the door. You couldn't even stretch out your elbows and you probably had to be careful to keep from burning yourself with the lantern.
Plus, you really shouldn't drop the light. Fire, fuel and wooden, rocking boat... Plenty of risk.
But amazing possibilities over the horizon.
Note: The Star of India is docked at San Diego, California, USA.