 In recent decades architects and artists, in addition to sign designers, have again adopted neon tube lighting as a component in their works.Neon lighting is closely related to fluorescent lighting, which developed about 25 years after neon tube lighting.In fluorescent lights, the light emitted by rarefied gases within a tube is used exclusively to excite fluorescent materials that coat the tube, which then shine with their own colors that become the tube's visible, usually white, glow.