Yes, LICHEES is a Scrabble word!

Letter values in Scrabble US: L 1, I 1, C 3, H 4, E 1, E 1, S 1.

Is it a valid word?

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

Chinese tree cultivated especially in Philippines and India for its edible fruit; sometimes placed in genus Nephelium
Chinese fruit having a thin brittle shell enclosing a sweet jellylike pulp and a single seed; often dried

Also: litchi tree, litchi chinensis, nephelium litchi, litchi nut.

Not playable in Scrabble US: LITCHEE, LEECHEE.