Colour reading is a real issue for industrial models. I've been working on it for more than 12 months now, since December 2009. After many months of hard work, • starting with the standard colour reader (season 1 ) with features a red LED, • adding extra light from bulb lamps (season 2 ), • using a powerful external white LED lamp (season 3 ), • changing the built-in standard red LED for a white LED (season ...