"Dolphins" is a UV (ultraviolet) blacklight fluorescent and glow-in-the-dark phosphorescent
postcard print, made from the original psychedelic spiritual visionary fantasy fine art mural painting by Symeon Nostrakis, and depicting a Photorealistic Underwater Scene:
Three Dolphins swiming in Harmonic formation close to the sandy bottom of the Sea,
and a Spiral of Bubbles in the Green Waters of the Seascape background.
If you don't have a UV black-light, the postcard will still glow in the dark and of course be visible in normal light.
For better glow-in-the-dark results place postcard near a bright light source and allow at least 30 minutes for charging.
The brighter the light and the more time the postcard is exposed to it, the more energy it will absorb and the more it will glow.
Additionally, the darker the room when you switch off the lights, the more pronounced the night glow effect will appear.
A black light source will charge the postcard better and will make it glow more than a normal light source would.
Alternatively, you can use fluorescent lighting for charging (FT tubes or small CFL economy lamps).
Old incandescent lamps cannot provide sufficient charging as they do not emit UV light.