This module is the fifth in a series of eleven modules in an energy conservation curriculum for secondary and postsecondary vocational students. It is designed for use by itself or part of a sequence of four modules on understanding utilities (see also modules 3, 6, and 7). The objective of this module is to train students to recognize energy-related factors in lighting, including differences in light bulbs and fixtures. First, an introduction to the module and definitions of key terms are provided. Next, the text is presented in the following three units: (1) lighting efficiency; (2) estimating lighting requirements; and (3) tips for better lighting efficiency. The information in each unit is presented in lecture format accompanied by laboratory exercises and questions/examples for class discussion. A bibliography and several charts illustrating the text material are found at the end of the module. (BM)