Strong’s Greek
G2987 — lamprotes
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
λαμπρότης
lamprotes — pronounced lam-prot'-ace
from 2986; brilliancy:--brightness. see GREEK for 2986
1 occurrence in the KJV.
Acts 26:13
At midday, O king, I saw in the way a light from heaven, above the brightness of the sun, shining round about me and them which journeyed with me.