Factors to consider when selecting an LED Solution: Binning
The rapid adoption of Light Emitting Diodes (LEDs) or solid state lighting means that specifiers and designers often struggle to apprehend the basics of LED technology before installing it. As innovative LED lighting technologies continue to be adopted for a variety of applications, it is essential that users have a good understanding of the factors to consider when selecting a product.
In this particular blog, we will consider the importance of binning when selecting a new LED light source and explore how it works.
What is LED binning?
Difficult to control variables in the production process mean that LED components often vary. Even those from the same batch can differ in colour, flux and forward voltage. Binning is the process of measurement of LEDs to make sure any such deviations in performance are limited from one LED to the next. The process of binning sorts the LEDs based on their light output (lumen output), color temperature, forward voltage and CRI (color rendering index) under same test conditions.
Why is LED binning important?
Stable and homogenous light from LEDs is extremely important to ensure the quality of light and overall performance. Binning is critical for categorizing and labelling LEDs by key characteristics, ensuring they perform consistently when utilized within an LED fixture.
One of the key binning criteria is the forward voltage of the LED. This is very important parameter from reliability and appearance perspective when LEDs are arranged as multiple strings. If the LED string voltage varies between the strings then the current distribution between the strings will vary considerably. For example a 10% string voltage difference can cause 80% skew in current distribution on an LED board. This will mean the current flowing through the lower voltage strings will be higher, hence, the LEDs will be brighter and potentially close to their maximum rating, leading to reliability and light output non-uniformity. Quality binning processes ensures minimal failure rates while maintaining consistent light output at the fixture level across an installation.
Another factor that can drastically vary between LEDs is the color and intensity of light they emit. Given the fact that a selection of LEDs is used to create a single light point, color consistency is pivotal to performance. This means that LEDs cannot differ too much in color from their neighbours.
To put this into context, products can be purchased with an intensity that varies from 20 lumens and 50 lumens. Depending on the LED fixture and its application this could dramatically affect the quality of light provided.
We have developed a wide range of quality products that enable customers to choose the binning level most appropriate for their application. Our standard offering comes in ¼ bin, or a 3-step MacAdam, with the highest spec boards offered in a single bin, a two-step MacAdam, which would deliver a more consistent color.
If you would like further information about our LED Solutions range, please visit our LED Solutions page or contact our sales teams:
US: USsales@harvardtechnology.com / (001) 858-882-3844
UK/Europe: firstname.lastname@example.org / +44 (0)113 383 1000