That is an interesting concept and I would certainly like to see the outcome.
From what I have read, most people on here cut about .010 deep.
I have only made 2 signs so far and I cut .035 deep.
I think it gives
I’ve spent some time working with leds. As you may know it comes down to the amount of power being applied. As battery power drops off so will brightness starting at the end furthest from the power source. With leds you want to be one step up on amps available so your not starting out with just the minimal power.
Single, RGB and directional leds require specific amps per led. You’ll find the amps per led by Googling the type of led your using. That should help to figure out how many amps the 12v power supply needs to be. I’ve not worked with anything other than 12v leds. They sure do add an element of “cool” to any project.
I’ve used 8 AA batteries to power a portable sign I made for an inlaws business. I made 3 trimmed/soldered RGB strips to make an arrow -> about 30" total length. Worked great. If I had access to an outlet I would have used a 1 or 2 amp 12v plug in. eBay power supplies from China work but you won’t find a UL marking on them, which makes me nervous.
Also, if you purchase individual led diodes you can power them with around 5v but I didn’t go down that path yet. Once I get this xcarve controller plan to make a few led project I’ll share.
Depends on your overall design requirements. Led strips are the go to for sure but led modules are functionally similar might be better for some applications. There are dozens of options with led strips alone. Are you thinking about this with the intent of selling? If so look for lights with a warranty. Its worth the extra money. We’ve used both of these guys. Maxbrights are high end but if at absolutely has to work they’re the ticket. https://www.maxbriteled.com https://www.superbrightleds.com
If I can find someone to buy - I’m selling . I literally picked leds up in China. There is a real issue with quality and sometimes good enough isn’t good enough. Especially if you’re selling them. I’ve never made a dime on leds. I’ve cut, soldered and hung well over 200’. My friends love them.