Luxo aims to sell LED luminaires with single LEDs, LED modules and LED drivers with the best possible quality. We also strive to provide customers with the quality they want, nothing more, nothing less. By doing this, we provide a good cost/benefit ratio to our customers.
Our engineers are among the world’s leading experts on LED technology
We use their expertise to design and manufacture innovative products with low energy consumption and long life. Equally important is our experience and know-how about the design of optics and thermal control, so that the products will perform to standard over a long period of time.
How we work with LED
We always use the best quality LEDs for our products, from the best manufacturers.
Particular attention is given to the color temperatures and color rendering qualities of the LED lightsources we use.
High power LEDs require more precise current and heat management than traditional lightsources. Our know-how of thermal control has significant influence on the lifespan of our products.
LED products often have problems meeting glare requirements. Our engineering skills ensure that our LED products always meet or exceed relevant national and international standards.
While LEDs do not have a full color spectrum, we must pay special attention to their color quality and color rendering capabilities.
LEDs may contain less red wavelengths which can cause poor rendering of red colors. It is possible to avoid this by using special materials when producing the diodes. This is why one must pay special attention to the LED’s color rendering index (CRI) which is often expressed as Ra.
When LEDs are produced, they are formed with many different colors or color temperatures. The International Commission on Illumination’s (CIE) color diagram is used to create a binning structure, i.e. groups of diodes that share the same color characteristics. LED suppliers offer different bins of LEDs to luminaire manufacturers. The fewer bins the higher cost.
Some binning systems relate to the human eye’s color sensitivity via a model called MacAdam ellipses. The ellipses are mapped onto the binning structure in the color diagram and their size corresponds to the LED’s color tolerance. The size is measured in steps. The more steps, the bigger the tolerance and the easier it is to spot a difference in color. Generally, a 3-step ellipse is considered a good color tolerance. Most Luxo luminaires comply with a 3-step tolerance.
One of the advantages of LED is that all the light is emitted in one direction. This entails fewer reflections inside the luminaire since we normally want the light to go downward only. If we need a light distribution that goes both up and down, the LED is less suitable compared to e.g. a T5 fluorescent lamp.
Conventional lightsources cast a lot of light backwards, which may be lost in the optics design of a luminaire. The LED, on the other hand, emits all light in one direction.
The performance of LED is often measured in terms of lumens per watt or efficacy. With luminaires with fluorescent tubes, the efficiency is explained using the LOR or Light Output Ratio. The LOR would measure how efficient the optics are. For these luminaires, the installed power in watt is often used as a measure on the luminaire’s light output. LED luminaires, however, usually use the rated luminaire lumen to determine the luminaire’s light output.
The rated lumen value from an LED module may give an inaccurate picture of how many lumen you actually get from the luminaire. When documenting an LED luminaire, Luxo always lists the lumen value out of the luminaire, the so called rated lumen, luminaire. When you compare this lumen output with a T5 luminaire you must take the rated lumen from the T5 lamps and multiply with the Light Output Ratio (LOR) of the luminaire (see figure).
One should pay special attention to the difference between rated lumen, luminaire and rated lumen, lamp, which is measured on the LED module. Previously, LED manufacturers listed the lumen output at a junction temperature of 25 degrees, or so-called cold lumens. The junction temperature is measured inside the diode itself. Today, a more common denomination is to use hot lumens, i.e. lumens measured at an ambient temperature of 25 degrees, which correspond to a much higher junction temperature.
A Light Emitting Diode (LED) generates light in a semi-conductor material, which is an electronic component. Using the right materials, a diode may produce visible light of various wavelengths.
White light is created by either using a blue diode or “chip” and adding yellow phosphor on top, or by mixing light from one red, one green and one blue diode (RGB). The use of phosphor conversion is the most commonly used method in the lighting industry, due to its high efficacy and flexible production method. The phosphor can be added directly onto each diode, or as a remote phosphor plate on top of a mixing chamber. This method creates a particular color spectrum or spectral power distribution for the LED depending on the phosphor layer.
LED is not a new invention and most of us are familiar with LEDs being the red or green signal markers on your Wi-Fi or television. These are referred to as low-power LEDs. During the last couple of years “high power” LEDs, i.e. LEDs operating at powers of around 1W, have reached a level of cost and performance that make them attractive to the general lighting industry.
Market studies forecast that in 2020, nearly 50% of all new and replacement lightsource unit sales will be based on LEDs. Since LEDs are more expensive than conventional lighting, the value of the LED sales will be even higher.
Currently, LED lightsource efficacy levels are around 160 lm/W (lumens per watt) compared to a compact fluorescent lightsource which produces an average of 50-70 lm/W. The LED itself is expected to yield around 200 lm/W within the next ten years (Sources: McKinsey and Osram).
The spectral power distribution (the amount of light emitted at each wavelength) of the LED incorporates the blue light from the chip and the yellow phosphor.
The chart above illustrates the development in efficacy (lm/W) over time for conventional and LED lightsources. Whereas fluorescent tubes are expected to reach a maximum of 120 lm/W in 2020, LEDs may reach around 200 lm/W. (Source: Osram)
The ability to place the light exactly where it is needed is a hallmark of a Luxo task light. The flexibility of the lamp head makes it easy to adjust our task lights for your personal needs.
It is the combination of arm and head movements that determines the degree of flexibility in a task light. Each of our task lights offer one, two or a combination of all three of the head movements below. These lamp head movements help you direct light where you need it, without moving the task light itself.
Our history of lighting for the individual began with the development of the L-1 task light in 1937. The freedom of movement, and the ability to place the light exactly where it was needed, forever changed the way task lights work.
L-1 was designed by Luxo’s founder, the engineer Jac Jacobsen, and is still in production today. The lamp arm is balanced by springs that work on the action and reaction principle of human arm muscles.
Modern range of arm-based task lights
Naturally, our range of products has been vastly expanded since those early days. However, the philosophy and knowledge from the development of the L-1 is still maintained in our modern products. Today, our range of task lights and other arm-based luminaires comprises a wide variety of arm technology, most notably with internal or external springs. They all have perfect balance, and careful ergonomics built into them. In fact, the aesthetics of the arm designs may be considered a quality in their own right.
The ability to place the light exactly where it is needed is a hallmark of a Luxo arm. The flexibility of arm and lamp head means that it is easy to adjust Luxo task lights for your personal needs. The arm construction ensures that the lamp head will always stay in the right position without drifting.
The best solution for achieving optimal workspace lighting is an asymmetric task light.
Ergonomically designed task lights distribute light evenly across the working area. Since light is directed across the worksurface, it will not cause any glare to the user or discomfort to colleagues. The even light distribution eases the transition between light and dark areas and allows your eyes to work in a constant, comfortable light.
Statutory requirements fulfilled
Requirements for good workspace lighting are laid down in the international standard for indoor workplace lighting, EN 12464-1. Luxo task lights surpass the illuminance requirements of a minimum average of 500 lux on the desk surface.
An individual ergonomic task light ensures optimal workspace lighting. The illustration below shows an important advantage of asymmetric light output: the luminaire may be placed outside of your immediate work area, allowing for increased space to work.
Vision accounts for greater than 80% of human perception.
66 million people are effected by Computer Vision Syndrome (CVS) and 91% of computer users experience eyestrain due to poor lighting conditions. Ergonomic task lighting is key to achieving workplace productivity, user control and visual comfort.
Two of the more common complaints from employees in a working environment regard room temperature and the amount of light. Often ambient light levels are too high and task light levels too low. Employees experience glare from lightsources and computer screens which can lead to unwanted aches, pains and eyestrain. In order to maximize workplace productivity, minimize turnover and increase loyalty from employees, it is essential to provide adjustable task lighting at every workspace.
People have different needs depending on their age and the type of work they do. For example, reading requires more light than computer work, and a 60 year old requires more light than a 20 year old. Modern, ergonomically-designed task lights with complete arm flexibility and controls such as dimming, allow for individual light adjustment and give users control of their workspace. Additional lighting controls such as auto shut-off and PIR sensors provide additional control as well as energy-savings.
Vision “controls” the positioning of the body to obtain optimal viewing conditions. Improper lighting causes eyestrain and undermines the benefits of other ergonomic products within a workspace. Optimal workspace lighting is achieved as ergonomically-designed asymmetric task lights distribute light evenly, across the entire work area, reducing the risk of glare and reflections.
An ergonomic task light:
produces enough light to illuminate an entire workspace
casts light over the length of the workspace minimizing glare
is positioned outside of the immediate work area
does not strain the eyes
reduces tension on the neck and back that often results from sitting incorrectly in order to see well
allows for individual adjustment
improves well-being, productivity and job satisfaction
The personal task light is actually one of the most important components for a good working environment.
Unwanted aches and pains
A whole range of unwanted aches and pains, headaches, neck and back ailments and eyestrain can be attributed to poor lighting. This is because the body compensates for poor lighting; we adopt unhealthy postures in order to see well.
When fitting out or refurbishing your workplace it is essential to provide adequate light from an adaptable and easily adjusted source such as a task light.
The key to reduced general lighting
By placing a task light at each workspace, we are not only providing the individual with a good and ergonomically correct lighting solution, but are also making it possible to substantially reduce the general lighting in the room.
The amount of light you need changes with age. A 60 year old requires 5-6 times as much light as a 20 year old.
At Luxo we know how important light is for the working environment and for the health and well-bring of an individual in the workplace. Good lighting reduces the risk of health problems, increases safety, and enhances productivity.
For this reason we place great importance on the light quality of our illuminated magnifiers. They are not just magnifiers with light, but powerful luminaires with excellent light output. The quality and exact positioning of the lightsources in relation to the lens allow for virtually shadow-free magnification and excellent color rendering capabilities.
LED: Lightsource of the future
During the last few years we have designed, developed and manufactured a new generation of luminaires, using LED instead of traditional lightsources. Light Emitting Diodes (LED) are semiconductors that emit light when an electric current passes through them. LEDs can be used on their own, or assembled into modules for added power.
Light emitting diodes have an incredibly long life span. The diodes in our LED magnifiers have a life expectancy of over 50,000 hours. That means 25 years or more with normal use.
Ergonomic. Energy efficient. Economic.
Our modern LED magnifiers are designed to provide the best possible ergonomics, while saving energy. They use only a fraction of the energy required by luminaires with traditional lightsources.