Las células ganglionares especialmente sensibles al componente de luz azul se encuentran en la región inferior de la retina. No están involucrados en el proceso visual, sin embargo, sirven como transmisores de señales para nuestro “reloj interno”.
Human Centric Lighting
Are you ready to ride the wave?
Article Reference Source: Experience natural light. Human Centric Lighting.
What is Human Centric Lighting (HCL)?
Light influences what we feel and how we behave, it is not only useful for us to see.
Light is the most powerful regulator of our circadian rhythm. It also has visual, biological, and emotional benefits: it makes people look better, feel better, and function better.
Light sets our circadian rhythms, if we adjust the light properly we can improve the way we live and work. HCL is the use of light to influence our circadian rhythms and therefore emotional needs, to promote comfort, well-being and performance at work. And this makes human-centred lighting paramount to people’s health and well-being.
Every day, natural light goes through a variation of intensity and color: warm color with a slowly increasing light level at sunrise, to a cooler bright light level at noon, and back to warm color at sunset.
The lighting in our buildings, on the other hand, follows a static and uniform pattern that does not change throughout the day.
The use of HCL allows us to apply the variation of natural light in artificial light and thereby improve our emotional state, our comfort and comfort, as well as the performance of people in their tasks.
The impact of the HCL on the circadian rhythm or biometrics such as the circadian stimulus (RPI/LRC method) and the Lux Melanopic (Well Buildings standard), makes the “light quality” produced by the HCL system strongly correlated with the perception of well-being of the occupants. So when occupants like the color of light in a space, they will feel better to work or live.
Technological advances currently allow the implementation of HCL in an efficient and manageable manner. But it is not a new technology, although HCL is still in its infancy, it is already beginning to have increasing commercial and residential implementations around the world.
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- Light to see better: Lighting is essential for vision. Without enough light, we can’t see clearly and have a hard time focusing on the smallest details. But too much light has quite the opposite effect; dazzles, creates intense glare and can cause visual disturbances. The secret to lighting us up and allowing us to see better is in lighting solutions that create exactly the right balance between clarity and comfort.
The Philips portfolio includes high-quality human-focused solutions, providing better quality and reliable lighting. They also prevent unwanted negative effects, such as light effects like flickering, which come with cheaper indoor lighting alternatives. All Signify LED solutions are rigorously tested and covered by the six pillars of quality you can count on: lighting, warranty, innovation, people, support and leadership.
- Light to work better: The biological effects of light are what determine our general sense of well-being. Humans have lived outdoors for thousands of years, so it’s only natural that our bodies have evolved in response to changing patterns of light. Natural daylight provides the right light, in the right amount, with the right spectral content, at the right time to keep our circadian rhythm in sync.
In a perfect world we would all spend more time outdoors to improve our health and well-being with natural light. But the reality is that we live more than 90% of our time indoors and 36% in the workplace (according to studies carried out). Indoors, most of us don’t get the right amount of natural light we need to feel healthy and happy.
During an average sunny day, people are exposed to light levels of 100,000 lux, or 10,000 lux on a cloudy day. But it happens one day at the office and this is reduced to 500 lux, or only 300 lux while you are going to school. Because exposure to good light is very important for our mood, energy levels, comfort, productivity, sleep quality, and our overall health and well-being.
- Light to feel better: But what about the emotional benefits of light? One way that lighting can make people feel better in the office is through personal control. People often have very different lighting preferences and feel better when they can take control of them. Smart solutions that allow them to adjust recipes and light levels to suit different tasks, from concentrating to brainstorming, enhance feelings of job satisfaction.
LCH control
Today control systems can be with or without wires.
- Systems with threads. Most wired lighting control systems use copper wires to connect the switch and the light, it is the most widely used system.
Due to its regulation, 0-10V is the default low-cost lighting control solution, although lately DALI solutions are already fairly equal in cost.
The DALI (Digital Addressable Lighting Interface) and Digital Multiplex (DMX)/Remote Device Management (RDM) systems are other more up-to-date and modern lighting control systems, which we will not discuss in this text.
On the other hand, in some of the modern buildings, lighting control via Power over Ethernet (PoE) is gaining appeal. This technology uses the local area network (LAN) switching infrastructure to provide power over a copper Ethernet cable to a wide variety of devices, such as desk phones, security cameras, and thermostats. Today, even light fixtures can be powered and controlled as part of the PoE fabric that is the wired backbone of a modern smart building.
- Wireless systems. At that time we can already say that the variety of wireless control systems is extensive.
For indoor lighting applications, Zigbee (an IEEE 802.15.4 standard for a personal area network) is one of the most widespread, although other alternatives such as Bluetooth or Wi-Fi are also quite popular.
Bluetooth Low Energy (IEEE 802.15.1 standard) is a relatively new wireless control technology. It is drawing attention due to the recent introduction of a mesh network standard by the Bluetooth Special Interest Group (SIG).
These wireless technologies are receiving a lot of interest due to their ease of deployment, large (and growing) ecosystems, and cost advantages. They will play a key role in the future of connected lighting systems because both can be integrated with a building’s centralized management or automation system.
Wireless control will enhance the appeal of the HCL system
Advantages and problems of analog cable control system
– Lack of precision in the control of light output and CCT
– Labor cost for control system wiring
– Separate control devices for light output and CCT
Advantages and problems digital cable control system
– Labor cost for control system wiring
– Requires experience for system commissioning
Possible applications
Custom hotel room lighting can help guests adjust to a new time zone and overcome jetlag.
Light levels in industry can be adjusted to reduce fatigue and errors and the health impacts of shift work.
In healthcare and senior care facilities where lighting simulates the rhythms of daylight to help patients and residents sleep better, recover faster and feel happier.
In schools, lighting can be used to improve performance and concentration or to calm students down.
And around offices customize light settings to create a more inclusive and comfortable workplace.
Article Reference Source: Experience natural light. Human Centric Lighting.
