I saw some mineral wool on sale at menards. Is this stuff good for the ceiling to reduce sound. Or is there a specific kind or brand needed for the ceiling to deaden sound. In other words is all mineral wool the same. I have read that roxul is good, but probably too expensive. Also, I have read that this stuff does not burn. If that is the case can i install next to recessed can lights that are not rated to be next to insulation.