PURPOSE: To increase luminance of chemical emission effectively, by adding glass fibers, asbestos, etc. to a chemical illuminant system.

CONSTITUTION: Glass fiber, silica glass fiber, superfine artificial fiber, asbestos, zeolite or diatomaceous earth is added to a chemical illuminant system which emits light by contact of a solution of a chemical illuminant such as bis-9,10- phenylethyl anthracene with a solution of an oxidizing substance such as hydrogen peroxide and the system is made to undergo luminescence reaction in the presence thereof. Preferred additives are superfine fibers with a diameter of about 1W2μ and paper, cloth, etc. made thereof.