Yes, GLOWED is a Scrabble word!

Letter values in Scrabble US: G 2, L 1, O 1, W 4, E 1, D 2.

Is it a valid word?

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

emit a steady even light without flames
have a complexion with a strong bright color, such as red or pink
shine intensely, as if with heat
be exuberant or high-spirited
experience a feeling of well-being or happiness, as from good health or an intense emotion