The invention relates to an illuminating web, characterized in that it is flame-retarded by a flame-retardant composition impregnated into the bulk of the illuminating web and/or included in a coating on at least one face of the illuminating web. The illuminating web exhibits an improved performance in terms of reaction toward fire. It is better suited to the standards in force as regards reaction to fire. It also exhibits an advantageous illuminating performance and has good acoustic properties, when it incorporates a support appropriate for sound insulation. The invention also relates to an illuminating structure composed of said web added to a rigid or semirigid support. This structure can be used in particular as partition wall or ceiling in a building. With regard to the web proper, it can be used as painter's canvas or stretched fabric or part of these.