Human Centric Lighting

        Is there a question in your mind: Does lighting affect human health? Human centric lighting(HCL) is an essential topic in the lighting area.

        When it comes to HCL, the first things that come to mind are good eye hygiene, eye-protective lighting, and uniform, bright, anti-glare lighting when studying and working. Ceiling lamps, table lamps, and floor lamps can all achieve this.

        The "human centric lighting" runs through the whole process of life, not just illuminating the space.

        For diurnal mammals, light is a "switch" to regulate their daily activities and physical condition.

        In the dim light, such as at dusk and bonfires, the "pineal gland" in the brain can secrete "melatonin" to relax the body and make us fall asleep quickly. It is known as the natural sleeping pill.

        In a bright light environment similar to daytime, the "pineal gland" will reduce melatonin secret to awaken the brain and keep our body excited and alert.

        Thousands of years ago, the ancestors worked according to the sun's rises and sets. Go to bed with the lamb and rise with the lark. These days, we live under the light of lights whenever we are indoors, from waking up to going to sleep. It may be difficult for the body to adjust to the corresponding state and affect health if the lighting environment is invariable.

        People need to stay awake and excited when they are studying and working, and they need to be soothed and relaxed when resting. If the light is invariable, it cannot meet the body's requirements. If the light is too bright, people can not relax their body while resting. If the light is too dim, people will feel drowsy and listless when studying and working.

What HCL should do:

        Provide appropriate illumination and color temperature according to different needs, improve the quality of work, study, and living conditions, and promote people's physical and mental health.

        Dimming and adjustable color temperature are not gimmicks. We should make full use of them and make a healthier life. The typical color temperature range is 2700~6500K which is insufficient for human centric lighting. It needs to be expanded to 1000~10000K to meet the body's requirements and even more light color options to meet psychological needs and healing effects.