What we do here at Technical Calibration Labs, is calibrate color matching equipment once a year, to make sure that the color spectrum and brightness for your lightbooth are in spec. Over time, the lights inside your lightbooth shift in color and intensity, and you may not be seeing the same color in the samples as your suppliers. What we do is make adjustments to your machine and change bulbs as needed, to ensure that you AND your suppliers are viewing your samples accurately. This will not only save a great amount of time and money, but the convenience and piece of mind of knowing that you are reading your samples accurately is wonderful.