How to specify a panel LED luminaire
Most people know what LED lighting is and what benefits it offers. With such advanced technology that is constantly evolving, being up-to-date can be time consuming. LED offers many opportunities to customize the lighting solution that matches the need based on eg. design, energy efficiency and other parameters relevant to any project.
No standard for lighting performance
The lighting industry is still unregulated in some areas. There are several standards, but in relation to the very general values such as energy efficiency, no specific requirements are set for the lighting solution, only through building regulations. With this as a starting point, in the blog post we take a closer look at the values that are extremely important and at the same time illustrate how the best lighting solutions are found.
Let's take an example:
Listed below are some of the technical data that are worth looking into before choosing an LED panel.
|Lumen||2.834lm, 4.000lm, 5.000lm|
|Lumen per watt||142 LPW or 100 LPW (LEDs 150 LPW)|
|Color Temperature||3000K, 4000K, 5000K (Opt tunable white)|
|Color Rendering||CRI80 (Opt CRI90)|
|Lifetime LED||105K hours at Ta = 25°C (L70) B10|
|Dimming||DALI, 0-10V, Push dim, DALI Version 8|
Lumen tells you how much light comes out of the light source. This means that a higher lumen value emits more light. Should you, for example illuminate larger areas, we recommend choosing a high-lumen luminaire that could be a product like NS60.
Lumen per watt (LPW) measures energy efficiency. A high value is also an indicator of an energy efficient light source. In this example, the product has LPW of 142 and seen in relation a light bulb emits 10 LPW.
Color temperature is measured on the Kelvin scale from 1,000-10,000K, which tells you whether the product emits a warm (lower value) or cold light (higher value). This value is especially important when creating a certain atmosphere in the room. In our example, the product is available with 3000K, 4000K or 5000K as well as the option to install the LED panel with Tunable White. It is a concept that adjusts the light based on given work situations. It can for example be relevant if you’re going to build or renovate new offices. The technology allows you to set the luminaires to support the activity that takes place in the room, which has been shown to enhance efficiency and energy levels in humans.
Color rendering (CRI) says how well the colors are reproduced in the room on a scale of 0-100. It is said that the higher the value, the better the color rendering, which especially has something to say based on the function the light should have. This fixture has a CRI80 (option for CRI90).
MacAdam indicates color stability on a scale of 1-10. The higher the MacAdam, the more impure light. As seen in the technical data, MacAdam of 2 or 3 (as is the case here) will make sense, as you will not see a big difference in the light color.
Lifetime tells you how long the fixture will light before it needs to be replaced. In this case, the fixture will be able to light 105,000 hours with a temperature of 25 degrees. After that, the actual luminous flux will be 70% compared to when the product was new and will be 10% expected defective after the lifetime.
Dimming allows you to control brightness and volume. DALI or 0-10V are some of the most stable choices for dimming when talking LED lighting. If you're choosing a more advanced solution we would recommend using DALI.