光亮度

brightness / luminosity

light / ray / CL:道[dao4] / bright / only / merely / to use up

to pass / to spend (time) / measure / limit / extent / degree of intensity / degree (angles, temperature etc) / kilowatt-hour / classifier for events and occurrences

to estimate / Taiwan pr. [duo4]

bright / clear / resonant / to shine / to show / to reveal

bright

brightness