Meaning
Performance deviation measurements track the change in the color coordinates of a light source over time. Under operating conditions, chromaticity shift represents the movement of the emitted light from its initial color coordinates on the chromaticity diagram. This variation typically occurs due to material degradation, temperature changes, or aging of the phosphor and LED package, which results in a visible alteration of the light quality.
Commercial Consequence
Contractual warranties often specify the maximum allowable shift over a set period, especially for architectural or commercial lighting. When chromaticity shift exceeds these thresholds, it triggers warranty claims or product recalls. Standard distribution agreements allocate the risk and cost of these failures between the manufacturer and the distributor.
Distribution Risk
Wholesale buyers require consistency in multi-year projects where fixtures are installed in stages. A noticeable chromaticity shift can prevent new fixtures from matching older ones, leading to customer rejections. Distributors manage this by requesting batches with tight tolerances or securing long-term supply guarantees from the manufacturer.
Service Exposure
Liability for replacing color-drifted fixtures is often governed by service level agreements. High rates of chromaticity shift can increase the service obligations of installer partners and strain channel relationships. Manufacturers minimize this risk by utilizing high-grade phosphors and implementing rigorous burn-in testing.
