# colour.constants.CONSTANT_KP_M¶

colour.constants.CONSTANT_KP_M = 1700.0

Rounded maximum scotopic luminous efficiency $$K^{\prime}_m$$ value in $$lm\cdot W^{-1}$$.

Notes

• To be adequate for all practical applications the $$K^{\prime}_m$$ value has been rounded from the original 1700.06 value.

References

[WS00g]