This application note describes an innovative analog solution for a complete ballast circuitry optimized to feed a 35 W high intensity discharge (HID) metal halide lamp (MHL), without making use of any microcontroller to regulate and control the lighting output. This circuitry is used on demonstration board STEVAL-ILH002V1 shown in figure 1. The lamps used for this design are a 35 W metal halide lamp CDM-T (Philips) and an HCI-T (Osram).