Low blue LED

Low blue LED bulbs have increased in popularity recently following many studies that established the impact of blue light on the circadian rhythms. The photo receptors in our eyes are highly sensitive to blue at night. Therefore, the strong blue light in standard LEDs appears to have a measurable impact on the circadian rhythm, while red light has minimal impact. Therefore, it is generally considered best to reduce exposure to blue light in the evening, in order to help promote deeper sleep.

The sun’s white daylight spectrum also contains a significant amount of blue light, so exposure to white light during the daytime can have some positive effects, including boosting alertness and productivity. During late afternoon and into sunset, the amount of blue light from the sun is significantly reduced while the relative deep red and infrared light ratio increases. The deep red and near-infrared light present in the late afternoon solar spectrum and particularly during the sunset have a calming effect on mood by promoting the release of brain dopamine. This helps explain why exposure to blue light in the evening can cause sleep disruptions and prevent night time rest. Our eyes and internal body clock have been accustomed to this daily changing light pattern over the millennia.

That’s where low blue LED lighting technology can help. By using specific amber phosphor technology, it is possible to produce LED light with zero-blue content. This can be achieved by re-designing the internal light-emitting device components or by simply adding an external remote phosphor film as a lampshade on most  commercial white LED products that contain a significant amount of blue light. The same zero-blue products also enable direct conversion into the SAE Amber Zone for a wide range of automotive, maritime, and aerospace applications.