Many people like projection clocks because it looks cool to view time in an unconventional way.

A regular projection clock projects time on the ceiling or wall when you press the button or when the alarm goes off. If you would like the projection function to work all the time, plugging in the adaptor will do. However, since the projection light beam is not very strong, you can only see the projected time in a dark room.If you would like the projected time on wall or ceiling in daylight, you need a daylight projection clock. The main difference between a regular projection clock and a daylight projection clock is the brightness of the projection: