An LED-based light for replacing a conventional fluorescent tube in a fixture is provided. A class configuration selection unit selects an optimal class configuration from the number of the class configurations using an arbitrary evaluation value. Different multiplexing sequences of color data components and inverse color data components may be utilized at varying duty cycles to generate a compound image which is highly confidential and secure from unauthorized viewing. Compounds having -turns and -turns can be synthesized, regardless of the kinds of amino acid residues, and it is possible to synthesize compounds in which desired amino acid residues are introduced into sites of -turn and -turn based on their importance from the viewpoint of biological activity. The at least one subscriber is classified in a category when the data describing the event timeline indicates that the at least one subscriber viewed an advertisement and the purchasing data indicates that the at least one subscriber afterwards purchased an advertised product or service.