A light emitting device in an embodiment includes first and second light transmissive insulators and a light emitting diode arranged between them. The lubricating oil filter is positioned in a lubricating oil path upstream from the wheel hub bearings and is mounted with the wheel hub for rotation. A multi-chamber processing apparatus is also provided. The conventional toilet handle is replaced with two pull-cord operating handles, one for selecting a short flush to clear only liquid from the toilet or the other for selecting a full flush to clear solids from the toilet.