Method for evaluating performance characteristics of dental curing lights

A method for comparing performance characteristics of a plurality of light emitting-devices, the method comprising:

• providing one or more performance evaluation members for evaluating one or more performance characteristics of the plurality of light emitting-devices, each performance evaluation member comprising:
• a carrier material having a substantially uniform thickness or flat configuration;
• and one or more color-changing materials on or within the carrier material, the one or more color-changing materials changing color upon illumination with light of one or more specified wavelengths;
• illuminating the one or more performance evaluation members with light emitted by each of the light-emitting devices;
• and observing whether and/or how the one or more performance evaluation members change color so as to compare one or more performance characteristics of the light-emitting devices.

A kit for evaluating performance characteristics of one or more light-emitting devices, the kit comprising:

• a plurality of performance evaluation members that change color when exposed to different specified wavelengths of light emitted by one or more light-emitting devices, wherein the plurality of performance evaluation members include:
• a first performance evaluation member comprising a carrier material and a first photochromic material on or within the carrier material, the first photochromic material changing color upon illumination with a first wavelength of light so as to demonstrate a first performance characteristic of a light-emitting device;
• and
• a second performance evaluation member comprising a carrier material and a second photochromic material different than the first photochromic material on or within the carrier material, the second photochromic material changing color upon illumination with a second wavelength of light different than the first wavelength of light so as to demonstrate a second performance characteristic different than the first performance characteristic.