UV

[PolytheneSam]

I found a picture of a UVS-11 Mineralight.  I got a UVS-12 from a thrift store for $2.  It came in a box along with various rock specimens.  It says shortwave UV on the box.  I used something like it in a couple chemistry and biochemistry courses for making spots visible when doing TLC.

https://www.thevespiary.org/rhodium/Rhodium/hive/hiveboard/picproxie_docs/000293727-file_m8lp.jpg" title="View this image">
http://www.geocities.com/dritte123/PSPF.html
The hardest thing to explain is the obvious