Yes, PHOEBUS is a Scrabble word!

Letter values in Scrabble US: P 3, H 4, O 1, E 1, B 3, U 1, S 1.

Is it a valid word?

PHOEBUS is a valid word in the official Scrabble dictionary (US), the UK Scrabble Dictionary and Words with Friends (ENABLE).

(Greek mythology) Greek god of light; god of prophecy and poetry and music and healing; son of Zeus and Leto; twin brother of Artemis

Also: phoebus apollo.