When LEDs are manufactured they are broadly grouped into color categories such as red, red-orange, cyan, cool white, warm white, etc. These groupings can actually encompass quite a wide color and temperature range.
For example, cyan LEDs can range from 490nm to 520nm making the light output from cyan LEDs with a 520nm rating very 'greenish'. Similarly, red LEDs can range from 645nm to 620nm, making some red LEDs appear very 'orangey'.
For many applications, this is far too wide a color range to be useful, so as part of the manufacturing process every LED is tested to determine their exact color, lumens output and forward voltage and are then assigned a 'bin' number. Users can then request a specific bin number if their application requires tighter tolerances.
LEDs are sold in two ways:
- By the reel - 1,000 or 2000 LEDs (depending on the color) all from the same bin.
- By cut tape - any quantity of LED, but selected from different reels and different bins.
If you need to order a quantity of LEDs that have a tighter color specification, then you will need to order full reels of LEDs. If you order less than a full reel, then the LEDs will be selected from general inventory which would have come from different reels. As a consequence, specific bin numbers cannot be guaranteed if you order in less than 1,000 or 2000 piece increments.
You can learn more about how Luxeon Rebel LEDs are binned and labeled on page 23 of the Luxeon Rebel specification document.
If you need a specific bin number, you must contact us before you order for availability.