The board was cut from some old X-ray extender boards. Just plain old glass/epoxy. Drilled the holes and mounted them up. left a 1/2" tab to stick in the socket and epoxied it up.
The back side, how it looks in the housing and the next two are the light. First is a 19W incandescent and the second is the LED. The commercial ones were almost as bright but the color almost hurt. BTW the LED pic is with the added diffuser.