“There he was transfigured before them. His face shone like the sun, and his clothes became as white as the light. Just then there appeared before them Moses and Elijah, talking with Jesus.”
(Matthew 17.2-3, NIV)
“Peter and his companions were very sleepy, but when they became fully awake, they saw his glory and the two men standing with him.”
(Luke 9.32, NIV)
So Jesus gets changed, and looks like He’s made out of lightning. There is no reference though to Elijah and Moses looking like lightning! It is because those guys dwell in glory, but in Jesus, God’s glory dwells!
“The Son is the radiance of God’s glory and the exact representation of his being, sustaining all things by his powerful word.”
(Hebrews 1.3, NIV)
These guys were saturated in God, but God Himself never lived in them, by Holy Spirit or by physical body. In Jesus we have All of God.