कैंडेला से ल्यूमेन कनवर्टर — सूत्र

Candela to Lumens

Lumens = Candela x 2pi x (1 - cos(theta/2))

Where theta is the beam angle in radians.

  • Candela measures intensity in a specific direction
  • Lumens measure total light output in all directions of the beam

    • A narrow-beam spotlight and a wide floodlight can have the same candela but very different lumens.

    हल किया गया उदाहरण

    100 candela light source with 120° beam angle.

    1. theta/2 = 60° = pi/3 radians
    2. cos(60°) = 0.5
    3. Lumens = 100 x 2pi x (1 - 0.5) = 314.2 lumens