光こう量りょう

noun

amount of light; light quantity

Technical and general term for the quantity or intensity of light, used in photography, physics, and everyday contexts.

• このカメラは光こう量りょうが足たりないと、うまく撮さつ影えいできない。

  This camera cannot take good pictures when there isn't enough light.

• 植しょく物ぶつの成せい長ちょうには適てき切せつな光こう量りょうが必ひつ要ようだ。

  Proper light levels are necessary for plant growth.