Light + Health, Lighting Design

UL Launches Circadian Lighting Field-Measurement Service & Circadian Luminaire Certification

Randy Reid and Katie Smith recently published an article on LinkedIn, about UL’s latest moves into circadian lighting. The first new service from UL is a UL Circadian Field Measurement System. This service will allow UL field engineers to take measurements in customers’ buildings and create a floor plan with color-coded spaces to show the lighting designers where light output is above or below their circadian-effective lighting goals. This allows for field measurements to be taken with results being demonstrated in a heat map format. This service can be utilized in existing retrofits or new conditions.

Instead of working off computer-aided design plans, the system captures the actual light at eye level, including ambient light from windows and skylights and artificial light from luminaires, along with all of the reflectance from ceilings, walls, floors, furniture, and more. With those measurements, algorithms are used to calculate the effectiveness of the light’s ability to signal to the brain that it is daytime. Those calculations then create the circadian heat map that illustrates in color where people in that space will reach the circadian goals. These are voluntary goals defined by the lighting designer, based on the circadian model that they have chosen.

The second service is their Circadian-Effective Luminaire Performance Certification. In this program UL develops a custom testing and certification program to support a manufacturer’s verifiable marketing claims.

You can read the full article here.


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