On Sat, 28 Nov 2015 12:15:51 -0800 (PST), whit3rd
wrote:

On Saturday, November 28, 2015 at 6:07:17 AM UTC-8, Christopher Tidy wrote:
There are oil-miscible semiconductors, you could flood a bit of your oil tubing with
UV light and create photoconduction...

So you mean a semiconducting liquid which can be mixed with oil? Do you have any product names for these semiconductors? If it worked, it could create a nice show.

Tweak, Cramolin blue/Caig DeOxit, Stabilant-22A and -22L, and US patent #4696832
are all variants on this theme. End-user products have lots of other ingredients, and some
are soap/alcohol/grease mixtures (used to be chlorinated hydrocarbons).

Do a Google search for "oildag". I used Aquadag to make a conductive
coat on fused quartz. Was used inside a Ion Chamber that flew in the
early days of the space program.