Lighting Science, a noted brand in next-generation LED lighting solutions, announces the comprehensive results from a study, “The effects of spectral tuning of evening ambient light on melatonin suppression, alertness and sleep”, published recently in the medical journal Physiology and Behavior. The study shows that designing lighting to selectively inhibit the right wavelengths can substantially reduce the circadian disruption caused by exposure to light before bed.
Why is this Important?
Lighting affects our senses. White LED light spectrum has high blue peak as compared to other lighting technology. The following picture shows that white LED lighting has a high blue peak.
LED as a technology is very agile and easily tweaked. One example, is the Yellow LED lighting with less than 0.02% UV/Blue could be created by removing the blue spectral.
As for white LED light, specialty material could be used to absorb the shorter wavelengths, including blue spectral. Other approaches included mixing multi-color LEDs.
With specialty material like MCPET from Furukawa, Japan; white LED lighting could also be produced with 30% less blue spectral. Besides the blue spectral reduction, the same material diffuses the high intensity LED sources, mixes the light rays resulting in a homogeneous surface lighting with low glare. This is excellent for Hospital or schools. In fact, one could achieve close to natural light at 95 Ra color accuracy. This add cost to the lamp.
Sometimes, payback or Return On Investment may not be the only criteria to select the correct type of lighting. Lighting affects our senses. It affects the health of our eyes. Sometimes, we feel tired because of lighting. It affects our circadian rhythm.
Light Quality, Light color accuracy, lighting ambiance, flickering, lux level and how they affect the eyes are some parameters worth considering. Whatever we installed will affect the young eyes of children using those lights. Human centric lighting looks at the ergonomic aspect that affects life.