Use sunburst for designs or figures of burst of sunlight, but may not necessarily be the actual sun (heavenly body). (See post #645306)
It consists of rays or "beams" radiating out from a central disk in the manner of sunbeams.
A sunburst tagged image can also be tagged sun_(symbol). (See post #27994)
Sunbeam is where light rays stream through gaps in clouds or between other objects. (See post #438675 post #336275)
Sunlight is the light that apparently or observably coming from the sun in the sky. (See post #5469)
For tagging purposes, keep in mind that a particular image may satisfy one or more of the specific terms mentions above.
The following tags implicate this tag:
rising_sun and sunburst_background