A system and method for using an e-commerce system to provide a user with the ability to order customized identification documents over the Internet is provided. The encoder circuit includes a luminance-level-based representative color generator to generate representative color values for each of a plurality of luminance levels to produce at least a high color value and a low color value. The second stream of fluid may be positioned to intersect the first stream of fluid and perturb its laminarity. Each channel is selected in a rotating sequence for connection to the amplifier.