That is an interesting idea! I’ll definitely take your idea into consideration and try it out.

I like that, with your idea, I would be able to sell the RoboGlyphs separately, and sell the illuminator separately. People could ‘hack’ the illuminator to run it with an Arduino!

since you have radial access to the class from your rounded tab, wonder if you could make a tab insert illuminator, several leds arranged in a semi circle around the tab, in a small black plastic device. powerd by AAA and it might be the same height as the glass.

oh! give the “illuminators” edge and tab recievers, and you could chain your “illuminators” with your glass etchings.

On the lighting, try edge lighting with an LED. Use a flame to flame polish the edges everywhere except where you put the edge LED. The polished edges should not light but the rough surface where your letters are should light up well. You may need several LEDs along the edge to get the effect you want. Look around the net for edge lighting articles, I have seen many. Send me an email if you need the links.