光度

光度	guāng dù	luminosity
光	guāng	light; ray (CL:道) / bright; shiny / only; merely / used up; finished / to leave (a part of the body) uncovered
度	dù	to pass / to spend (time) / measure / limit / extent / degree of intensity / degree (angles, temperature etc) / kilowatt-hour / classifier for events and occurrences
度	duó	to estimate / Taiwan pr. [duo4]