Lighting

Lumens to Candela Calculation — ChiefEngineer.in

Worked step-by-step example. Convert luminous flux to luminous intensity for a specified beam angle. Open interactive calculator →

Result

Intensity

318.31 cd

I_v = Φ_v / Ω, Ω = 2π(1 − cos θ)

Input: 1000 lm, 120° beam

Result: I ≈ 318.31 cd

Requires beam angle. Lumens alone do not determine candela.