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ft-l

/ˌef.tiː ˈel/

Перевод: Устаревшая единица яркости, равная одному люмену на квадратный фут.

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noun

/ˌef.tiː ˈel/C2formalscientific
  • ruУстаревшая единица яркости, равная одному люмену на квадратный фут.

A former luminance unit equal to one lumen per square foot.

  1. Luminance unitC2formalscientific

    A former unit of luminance equal to one lumen per square foot, used to measure the brightness of a surface.

    ruФут-ламберт

    • The display's brightness was measured at 50 ft-L.
    • Older projectors often specified their output in foot-lamberts.
    • The calibration standard required a luminance of 30 ft-L.

    Синонимыfoot-lambert