Welcome to accessiblelight.info
Accessible Light
Consumers, Contractors, Industry
A new world of healthy indoor light
Real product information available now for indoor lighting that matches the health enhancing rhythms of natural sunlight and light that destroys harmful microorganisms.
Our Approach
How we can be of Service
For the individual consumer interested in healthy LED light that takes advantage of our circadian rhythm and, possibly removes harmful microorganisms, we focus on what you can buy today. We also mention developments that will bring down expense for a particular range of products and save on energy usage thanks to using LEDs. Products in this category are all UL certified for safety.
For the Contractor we summarize LED systems now available and who makes them. This may involve several different vendors since the actual LEDs are only one part of larger system that may include simple wall switch devices for smaller installations and larger computer controlled systems for entire buildings. Only actual vendors with existing products will be listed.
For the manufacturer our efforts are focused on the continuing progress of their LED offerings as well as listing companies involved in matching the appropriate LED to working lighting systems. Our interest here is to move what manufacturers offer into a wider LED lighting market through product and company information.
Consumers
Creating real daylight indoors exposes my body to to the full daily range of light from morning wake up to a restful end of day for fuller sleep. Lighting systems that achieve this (bulbs and switches) are now available for home use.
Contractors
Design systems that create sunlight indoors as well as disinfecting circulating indoor air. Indoor sunlight and germicidal systems are currently available through a growing number of LED manufacturers.
Industry
Listing of companies actively engaged in the manufacture and sale of LEDS and LED lighting s systems in both the creation of indoor sunlight and germicidal systems.
About Us
About This Project
For the first time in human history, thanks to advances in LED technology and manufacture, we are able to create light that closely matches natural sunlight indoors. Beyond that, LEDs can be tuned destroy harmful microorganisms like Covid.
Understanding advances in lighting and its possibilities does not require advanced degrees and mind bending mathematics. Questions regarding LED lighting are simple – how does it improve my life and health, what should I be looking for and where can I find it?
Why do I spend time creating a site on what’s happening in the LED domain. The answer is simple – to fill an important gap between those who are developing life and health improving LED technology and those who desire LED lighting to improve their personal life and health.
Consumer
Bringing natural sunlight indoors. The simplest way of creating the natural circadian rhythms of sunlight indoors is through the use of lamps that imitate the changes…
Contractor
Healthy lighting for non-residential structures centers on usage. Hospitals have different requirements than warehouses or schools. Yet a healthy…
Manufacturer
Who makes tunable or UV-C LEDs ? The LED lighting industry is based on technology quite different from traditional bulb manufacture…
Case Study One
HCL’s first frontier: Hospitals – There is perhaps no environment more immediately suited to HCL than hospitals. It stands to reason that patients would rest better…
For night belongs to thieves, while daylight belongs to truthfuness.
Euripides
FAQ
Frequently Asked Questions
Getting in Touch
Because advances in LED lighting continue in the arena of health and wellbeing, new understandings about LED’s capabilities often need recasting. This site seeks to clarify what LEDs can do as actual product. We look forward to any comments or questions concerning LEDs and their use in improving our lives though the control of the light spectrum in both temperature and intensity.
Contact: mike@accessiblelight.info
What are the most effective and safest ways of installing anti-microbial UV-C LEDs
UV-C LEDS are most effective in disabling microorganisms of at a spectral range of 160-180 nanometers – optimally 168 nm. Exposure of an airborne virus such as Covid 19 to UV-C at 168 nm. is able to disable 99.9% of the virus within seconds. Since direct exposure to UV-C at this part of the spectrum can harm human tissue including the eyes, UV-C at 160 to 180 nm. must be shielded from human contact. The easiest ways of achieving this are to use UV-C LEDs only when people are not present (an empty room) or to use UV-C LEDs in combination with a closed air ventilation system where the UV-C LEDs are in an enclosed space that disinfects and delivers air such as in an HVAC system.
At present, some HVAC systems use Mercury based bulbs to deliver UV-C at 254 nanometers. The bulbs are placed at the outlet from the compressor. The disinfection rate for these bulbs is at least an order of magnitude less effective in disinfection of microorganisms and is fixed at 254 nm due to the physics of Mercury. Unlike non toxic UV-C LEDs which are solid state, mercury must be contained in glass bulbs that can shatter and release toxic Mercury into the general environment. In this usage UV-C LEDs at the 260-80 nm. range are being seen as potentially replacing the obsolescing technology of 254 nm. Mercury bulbs with a more robust source of UV-C light.
Do Circadian LED lighting systems, fixtures (bulbs, panel or strips), exist that are able to closely imitate the spectral changes of outdoor daylight?
At this time LED manufacturers are producing fixtures that are able to imitate natural daylight changes. The control systems for these fixtures, however, are produced by companies separate from LED manufacturers. They produce systems from single room control to total integration of a given structure – offices, warehouses, hospitals etc. The design and installation Circadian LED systems of this type requires understanding and integration of appropriate LED fixtures to a control system made by a seperate manufacturer.
About the Site & its Creator
Mike Graebner
“Accessible Light” came about as its creator, Mike Graebner, was researching new developments in LED lighting. Working with hardware and software technology for over 30 years in Silicon Valley, Mike has maintained a continued interest in moving technology from lab to customer. In that process he has chaired local chapters of the IEEE Engineering Management and Computer Societies and organized many conferences on emerging technologies. Converting his home to LED based lighting brought about an interest in this technology as it continues to offer new innovations in the use of LED based light for a healthier and less energy intensive environment.
Moving an exciting technology from the lab to the consumer requires understanding the science and its usefulness in a variety of consumer products. While wide spectrum (temperature) Circadian LEDs may be exciting to the lab, the benefits of such LED lighting for improved individual health should create wide interest among anyone desiring improved attentiveness or sleep. Personal control of such lighting for a healthier life using LEDs is now possible. Finding what’s out there and available in the plethora of LED products, while possible, requires information that is easily understood by the general user. That is the objective of the site – to present the important information regarding LED lighting in a way that can be used to purchase or design a healthy lighting environment.
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