Light at Night: Learn the Effects on Obesity and Diabetes

There is now substantial evidence that exposure to blue-rich light in the evening and at night increases the risk of obesity and diabetes.

Most energy efficient LEDs in the market today are rich in the blue wavelengths that at night trigger the metabolic processes involved in obesity and diabetes through:

1) Disruption of the circadian system (phase shifting and circadian misalignment)

2) Melatonin-suppression and phase shifting

Blue-rich light (including natural daylight) during the day is protective, but exposure to the same blue rich LED or fluorescent light during the night is harmful. To avoid this risk light fixtures need to provide nblue-rich light during the day, and blue-depleted light at night.

The population exposed to the highest levels light exposure at night and circadian disruption are people who work night shifts

Our white paper 'Light at Night: The Effects on Obesity and Diabetes' presents the scientific evidence and the lighting solutions now available. Download our white paper Light at Night: Effects on Obesity and Diabetes

To manage the risk of obesity and diabetes, light fixtures should provide blue-rich light during the day and blue-depleted light at night. The key is not just to lower blue content but to make sure the lights remove enough blue at night to reduce the risk. To address the risk of blue light, CIRCADIAN® Light has introduced fixtures that contain a light engine with both a blue-pump LEDs for daytime use as well as a patented violet-pump LED for evening and nighttime use.

The “night” LED removes over 90% of the bioactive blue content to minimize circadian disruption, and provides white light with a CCT of 3200K, and CRI of 80+. To control blue light exposure 24/7, the CIRCADIAN® Light fixtures automatically switch between day and night LEDs based on location, time and season. 

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