I removed the halogen lamp from the episcopic light house and replaced it with a 5 watt, 365 nm led bulb,hooked it up to the power supply at 3.65 volts and tested the lamp. That went well.
The specimen used is a thin section of Granodiorite. Photos taken are of brightfield uv and polarization to extinction.
I was able to rig it for transmitted light as well with good result.
Next month a 10 watt bulb will arrive from China and I hope to be able to view solid specimens with episcopic uv.
I
reached the limit for photos and can't add more now. Greg