This is an LED insert for kijai's excellent Forbidden Watchtower model.
I got the idea from yougurt's make of the tower, however that make was scaled up to fit the Tinkercard LED GLOW Circuit. https://www.thingiverse.com/make:392772
I didn't want to reprint and/or scale the model so I made a version of the glow circuit insert that fits inside the roof cap for the original model.
To install, I removed some of the support material inside the roof cap, but left a few layers to have a flat surface. Then simply glued it to the roof cap. If someone is more ambitious they could combine this model with the roof cap and print it that way. I went the easy route since I had already printed the full Forbidden Tower model.