Crossword Clue:

the measure of the brightness of a surface

AnswerCrossword Clue
INDIAQUEBECBrightness measure, to a pilot
AREA surface measure
IQTESTMeasure of brightness
LUMENMeasure of light's brightness
IQTESTBrightness measure
LUMENBrightness measure
MAGNITUDEStar brightness measure
WATTBulb-brightness measure
IQTESTINGWay to measure brightness
IQTESTSBattery used to measure brightness?