Yes, LIDARS is a Scrabble word!

Letter values in Scrabble US: L 1, I 1, D 2, A 1, R 1, S 1.

Is it a valid word?

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

a measuring system that detects and locates objects on the same principle as radar but uses light from a laser; a potential technology for detecting air turbulence that can affect aircraft