These are some Edge lit signs i have designed along with a neat little 3d printed base to house the electronics. The base is a clam shell design and the legs snap on. You will need a 12v power supply with a 2.1mm barrel jack connector to power this bad boy.

I use cast acrylic, cut on a CNC router for the sign portion. You can etch, engrave or sandblast any clear plastic and it should work, but cast acrylic is very easy to work with.

https://www.amazon.com/gp/product/B01LZUUH3K/ref=oh_aui_detailpage_o06_s00?ie=UTF8&psc=1 Here is the LED strip i used. Its pretty standard weather resistant 4 pin PWM RGB strip. You can use whatever, but the cutout is sized for the weather resistant stuff.

https://www.ebay.com/itm/5-PCS-Mini-3-Key-Controller-Dimmer-Amplifier-For-RGB-5050-3528-LED-Light-Strip/192221834182?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649 These are the controllers i use. Inexpensive and you dont have a stupid remote to lose. the cutout in the sign base should expose the buttons on the controller. I use hotglue to secure this inside the base.

https://solarbotics.com/product/swt15/ Here is a 2.1mm barrel jack plug with integrated rocker switch I found. It goes along way for making the base look legit. Should just press right into the base. Solder the controller leads directly to the paralell terminals.

https://www.amazon.com/gp/product/B072KRCJLD/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1 These connectors are not essential, but they make life alot easier. I cut them in half and solder a tiny peice of 22ga solid wire on each end. The 22ga solid wire plugs in nicely to the controller. I use hotglue to secure the wires once the controller is installed.

https://www.amazon.com/gp/product/B00GDXW3OE/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1 These self threading screws go through both halfs of the sign base and the acrlyc sheet, locking everything in place.