Yes, REFLECTIONS is a Scrabble word!

Letter values in Scrabble US: R 1, E 1, F 4, L 1, E 1, C 3, T 1, I 1, O 1, N 1, S 1.

Is it a valid word?

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

a calm, lengthy, intent consideration
the phenomenon of a propagating wave (light or sound) being thrown back from a surface
expression without words
a likeness in which left and right are reversed
the image of something as reflected by a mirror (or other reflective material)
(mathematics) a transformation in which the direction of one axis is reversed
a remark expressing careful consideration
the ability to reflect beams or rays

Also: mirror image.