The BIN code is indicated on the reel label. It is a separate data field from the component part number (PN). Two reels containing the same LED PN do not necessarily feature the same BIN. LEDs with the same PN and BIN appear identical when illuminated.
LED Bin chart. (from http://www.screenlightandgrip.com/)
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Rainbow-Light launches Portable Lighting Measuring Equipment with Display, manufactured by Microelectromechanical Technology as to has the features of small size, anti-vibration, anti-shocking and portable. Due to excellent and stable quality and low calibration demands, that can save lot of money in repair or correction.