@howsitwork You are living up to your name, LOL.
The light is below the resin. I cast the resin and the wood base together, then hollow out the base. I turned a thin walnut cap that covers the bottom and has the LED mounted on it. I glue that to the bottom of the base to close it all up.
I've been messing with these for awhile and I have no problem sharing how I do it. I'm not going to claim these are my idea...to be honest I have no idea if it is or not.
If you would like any other info let me know.