I rent an office and want an alternative to a whiteboard and continual dry-erase marker purchases.
I can shut out the light and use the surface under UV lamps only, that's fine.
Commonly listed organic glowing elements are blood, urine and semen. None of which, I think would be untraceable by eyes (or nose) during the day!
The surface I would like to use contains typical white interior paint, applied last year.