The second part of the iQ-LED tutorials contains descriptions of some details. We describe the measurement of a spectrum using the external spectrometer EX1, we explain how to define test sequences and carry out the calibration procedure. The Image Engineering iQ-LED tutorials offer information and practical guidance regarding our iQ-LED based products: CAL1, LE7 and the lighthead with iQ-LEDs. They help you getting started with our iQ-LED products. The two episodes of our iQ-LED tutorials guide you through the main functions of our iQ-LED control software.