How does a candle make a dark room bright?

A candle makes a dark room bright by producing light through the process of combustion. When the wick of the candle is lit, the heat from the flame melts the wax, which is then drawn up the wick and vaporized. The vaporized wax then reacts with oxygen in the air, producing a flame that emits light and heat. This light illuminates the surrounding area, making the room brighter.

A candle does not make a dark room bright. A candle emits light, which can illuminate a small area, but it is not powerful enough to brighten a dark room.