Screensavers with a light theme are popular because of their alluring and sometimes spectacular effects.
NightLights Screensaver takes a gentler approach to things by bringing a soothing, moody atmosphere to the Mac. NightLights Screensaver features an attractive red. green and blue light display, which the developer recommends as not only a screensaver but a suitable accompaniment for Christmas, New Year or Birthdays. If you register, you can add more colors the display. You have a limited amount of control over configuration, including settings for size and number of blinking lights.
It's nothing spectacular but NightLights Screensaver provides a soothing backdrop for those looking for a soft mood.