0. Introduction

Intelligent lighting control systems have only recently been introduced to China from abroad, with brands like Panasonic, Philips, and Chissel leading the way. These systems begin with centralized control, utilizing a single-chip microcomputer as the control unit and using two 24V signal lines for lighting control. Due to their numerous advantages not found in standard lighting controls, they are increasingly being applied in large venues such as squares, docks, auditoriums, and factories. Their superior performance is gradually gaining recognition and acceptance. The author primarily discusses the basic theory and structure of Panasonic's Four-line Intelligent Lighting System, and also introduces its practical application in the production workshop.