Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Light Beams Free.
Light Beams v1.1
Light shaft / beams simulation shaders and scripts.
Control fade distance, beam intensity, normal softness, texture move speed and other.
Wall collision control included.
Included are single and double sided versions.
Also you can choose between color versions or color and texture ( dust simulation ) versions .
Double sided shader versions require shader model 3.0 or higher.