Lighting Calculators (Page 2)
Photometry and lighting calculators: candela, lumens, lux, foot-candles and watts.
Lux to Watts Calculator
Convert illuminance (lux), area and efficacy to power (watts).
Watts to Lux Calculator
Convert power (watts), area and efficacy to illuminance (lux).
Inverse-Square Law Calculator
Compute illuminance E = I / d² from luminous intensity and distance.
Beam Diameter Calculator
Compute spot diameter = 2d·tan(θ/2) from beam angle and distance.
Lumen Method Calculator
Compute average illuminance E = NΦ·CU·MF / A.
Cone Lumens Calculator
Compute cone lumens Φ = I·2π(1−cos(θ/2)) from intensity and beam angle.
Distance for Illuminance Calculator
Compute required distance d = √(I/E) for a target illuminance.