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Photometrics
Tolerance on the values calculated from the photometrics: ±15%.
Photometrics have been normalized in cd/α and lx/α? to avoid to repeat the same curve for lamps with the same optical behaviour. α is the coefficient to be used to obtain the absolute values from the diagrams (cd and lx re-spectively).

HOW TO USE THE α VALUE IN ORDER TO OBTAIN THE LUX and CANDELA DATA YOU NEED

For example, a 50W 38° dichro lamp, code 01269:

α=0.8 Using the F5 photometric curve.

Find the values in the cone diagram(indicated with lx/α) and multiply by the α value, in this case 0.8.
So: 430 x 0.8 gives 340 lux on the axis at 2mt from the light source.
Repeat in order to obtain the candela (cd) values: 350 x 0.8 gives 280cd, and 560, 840, 1120, 1400 candelas (cd) at respective distances.


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