luminary

noun3

1. •
   A body that gives light; especially, one of the heavenly bodies.

   • […] then first adornd / With thir bright Luminaries that Set and Rose, / Glad Evening & glad Morn crownd the fourth day. — 1667
2. •
   One who is an inspiration to others; one who has achieved success in one's chosen field; a leading light.
3. •
   (no longer used) An artificial light; an illumination.