A short tutorial on the website with links to an LED circuit calculator?
The problem here is that not all LEDs are created equal and need a specific resistor to match the LED to the voltage being used (12V), so you need LED specs to calculate the resistor. Pretty easy, but you also need a diode if you are using AC. Then there is the heat migration issue, which I think I have mitigated somewhat, but it requires extra holes and screws, but if you are drilling for an LED you could drill those too.
Yeah, a basic How-To might be possible. But we are getting away from 'easy to assemble' at that point.