has dimension has unit 単位を持つ has value 値を持つ illuminance Φ_v Φ Illuminance is the total luminous flux incident on a surface per unit area. illumination illuminance unit quantity 量 attolux attolux centilux centilux decalux decalux decilux decilux exalux exalux femtolux femtolux footcandle gigalux gigalux hectolux hectolux illuminance dimension kilolux kilolux lumen per square metre lumen per vierkante meter lux lux megalux megalux microlux microlux millilux millilux nanolux nanolux petalux petalux phot phot picolux picolux teralux teralux