The main purpose of this paper is not to create another detailed lexical definition of light in accordance to the principles of theory, but rather to examine the methodology as well as the way of defining the light as a lexical unit by scholars (Dobaczewski 1999a, 1999b, 2001a, 2001b; Dyszak 1999a, 1999b). I argue that a semantic deposit (SD) domain of lexical unit light could be understood only if supplemented with semantic units that possess a high-abstractive meaning value organized in (...) Semantic Net structure (Semantic Net hereinafter referred to as SN). Therefore, lexical unit light cannot be defined as a property of semantic primitives’ faculty. (shrink)