LPA Light Pipe Arrays BIVAR LPA Light Pipe Arrays are rigid, panel-mounted, and have tubular body shapes. The LPA Series is available with Zero Light Bleed Technology, featuring a quadruple station in both right angle and vertical configurations. The devices feature flat or domed lens styles and 2mm, 3mm, and 4mm LED sizes. The LPA Light Pipe Arrays are ideal for aerospace, datacom, transportation, industrial, and energy applications.