ὕπαυγος
From LSJ
αἰὲν ἀριστεύειν καὶ ὑπείροχον ἔμμεναι ἄλλων → always strive for excellence and prevail over others (Iliad 6.208, 11.784)
English (LSJ)
ον, of a heavenly body,
A within150 of the sun, combust, Serapio in Cat.Cod.Astr.8(4).230, Paul.Al.L.1 (with Sch.), Steph. in Hp.Aph.2.363D. II less technically, exposed to rays, Orph.Fr. 353.