Enter the parameters for the planned light exposure and then click the Compute Fading button. Use the slider to see the effects of less than 100% of the planned exposure.
Calculated colour changes
Original colour (estimate)
Current colour (estimate)
Predicted damage by light with all UV removed
Predicted damage by light with UV (equivalent to daylight through glass)
Colour change, ΔE76 (from original)
Colour change, ΔE76 (from current)
Note: The height of each colour patch represents the fraction of colour remaining.
Calculated exposure values
Exposure that caused the prior fade, assuming no UV present:
0.00 Mlx h
Exposure that caused the prior fade, assuming UV present:
0.00 Mlx h
Future exposure that you have planned above:
43.80 Mlx h
The Light Damage Calculator was designed by the Canadian Conservation Institute as a tool to help museum staff estimate the effects of lighting on the fading of collections or individual objects under various lighting regimes.
The Light Damage Calculator was designed for convenience and should only be used as a reference tool. The Canadian Conservation Institute makes no representation about the accuracy, reliability, completeness of the calculator or the results to be obtained from its use. All information obtained are without any warranty of any kind. The Canadian Conservation Institute disclaims all express, implied and statutory warranties in accordance with the lighting regimes calculated by this calculator, neither assumes any responsibility with respect to any particular results of the fading of objects or collections nor how the results are applied to actual situations.