The present invention has an object of providing a light emitting device including an OLED formed on a plastic substrate, which can prevent the degradation due to penetration of moisture or oxygen. Methods are provided by which a single tab film may be adhered to an elongated strip of stretch releasing adhesive tape to form a manually engageable pull tab at a selected location. Signals from the precipitation sensor and temperature sensor are provided to an engine controller. Through the extension members, instrumentation such as a spine rod, set screw and other required hardware may be delivered to the anchors. The transmitting optical axis and the receiving optical axis are nonparallel and substantially in the same plane.