Home T-Sketch: T-Shirt with Illuminated Message Panel. T-Sketch: T-Shirt with Illuminated Message Panel. By -Deep DeyDeep Dey February 24, 2011 Anything that’s drawn on the wipe-clean panel activates a glowing light beneath so that it lights up. You can also change the flashing sequence to suit your preference – from a gentle glow right through to a pulsing strobe. Facebook Twitter Whatsapp Newer Older