Hi Mueum-l'ers, Does anyone out there use a large illuminated bar graph in an exhibit? I am working on a design where the light elements would be concealed behind a tinted piece of acrylic and I am trying to decide which lighting technologies exist in a format suitable for this type of display. I could just put lamps in rectangular light boxes, but I am also looking into any modular lighting systems which have low power consumption and are cost effective for a large display of this type. (20-50 elements 3-5 feet high) A bonus would be a system/light module which can be operated from TTL level signals or be directly interfaced to a computer via controller card. Any info appreciated. Thanks. Mark C. Vang Freya Ventures [log in to unmask]