T-Qualizer V2 Light Up T-Shirt - Adult X-Large. Going clubbing? Want to stand out from the crowd? Then you need a T-Qualizer T-shirt with unique 3D effect panel. This will really make people notice you as you light up the dance floor. The T-Qualizer is a light-up shirt with a built in graphic equalizer panel that is sound sensitive. As the music beats, the shirts equalizer lights up to the beat of the music. Great for concerts, raves and parties.