The aim of this subject is to obtain the basic theoretical and practical knowledge in the areas of electrical light and heat in order to marketing of luminous and heating appliance. Objective of laboratory measurements and calculation practices is to acquaint the students with basic parameters and calculations of luminous and heating appliances with regard to their sale. The subject includes interpretation of principles and origin of light and heat, commentary of basic calculation relations to review and compare particular luminous and heat appliances. This subject describes the possibilities how to reach the savings thanks to advisable choice and running of particular appliances too.