A SEG lightbox (Silicone Edge Graphics lightbox) is a framed, backlit display system that uses tensioned dye-sublimated fabric graphics with a thin silicone beading sewn into the edge. The silicone bead (the ''SEG'') tucks into a recessed channel in the frame, stretching the fabric smooth for a seamless, edge-to-edge print. SEG lightboxes are widely used for high-impact retail signage, trade show displays, office branding, and architectural backlit graphics in the USA.