Wristwatch Lights Density

The lights at wristwatch could be brighter, if the tube of the lights is smaller which can cause higher density of lights in smaller space. This can save battery for lesser energy needed.

Combining lights from different places to one place can be done using mirror.

Focusing lights also can be done through magnifier.

This is some of the way to have a better and less energy in gathering lights to a wristwatch.