When There's No Cure

Hahn reiterates the importance of precise location of the probe into the lamp assembly when measuring with either a radiometer or spectroradiometer. With this as a requirement, "it is most typical to take a baseline reading with a fresh bulb, clean reflectors, and optimum running electronics package," says Hahn. "After entering the baseline reading, subsequent readings are taken at regular intervals and then compared to the baseline reading to determine if the lamp is within tolerance."