how i did it was i used my mind, some computers, and a CNC attached to a laser.
its two pieces of acrylic resting on each others edge. there is no light between the Red and Blue where they meet. there is a film that separates the Red from the Blue so the look is clean.
from the correct angle you do not see the line of light.
its all edge lit by 420 LEDs. the internal frenzy of light colors the lettering.
total wattage is 24 watts at 12V.piece one is 86" x 43" piece two is 86" x 13".
it took about 12 hours to etch. using a vytek M-120 i laser etched two separate pieces in register. on two separate passes. dropped down by eye. both times.
its not an ipod, cellphone, or laptop. who be trying this size?
try and make it all you copycats.