Yes, DAHLS is a Scrabble word!

Letter values in Scrabble US: D 2, A 1, H 4, L 1, S 1.

Is it a valid word?

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

tropical woody herb with showy yellow flowers and flat pods; much cultivated in the tropics
small highly nutritious seed of the tropical pigeon-pea plant

Also: pigeon pea, pigeon-pea plant, cajan pea, catjang pea, red gram, cajanus cajan.