The correct interval depends on the red light therapy bed supplier’s validated design and the intensity of use, so there is no universal calendar period. A clinic with daily commercial operation may need a more frequent check than a private wellness room. Ask the supplier to state the recommended interval, the measurement distance, the instrument specification, the acceptable tolerance, and the action to take if output falls outside that tolerance.
The test should compare the same points and settings each time. A center reading alone can hide an uneven array, a cooling problem, or a partially failed driver. A repeatable measurement map is more useful than a single impressive number in a brochure.
