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Lumen Calculator (Lumen to Lux to Candela)
Convert between lumens, lux, candela, and surface area
Instructions: Select calculation mode, enter luminous flux (lumens) or illuminance (lux) along with surface area or beam angle to compute photometric parameters.
Photometric Parameters
Calculation Results
⚠️ For lighting design and physics education reference only. Assumes uniform distribution over a flat surface or spherical cap.