Lacking the black-light posters of my college years, I still managed to find a few pieces lying around that I could use to show off what these tiny bulbs throw for light.
Several months ago, I bought a couple of discount boxes of glow-sticks and found out WHY they were discount – These ones were crap. The chemical blend is too weak to glow under their own power, and the ones that DID light up, faded within an hour or two. BUT, the primary chemicals that produce the glow under UV were still able to react to the lights.
Those were cool, but it was time to step up just a notch.
Standard off the shelf highlighters
As you can see, your standard highlighters produce a much more energetic glow. Pink, Orange, Yellow and Green have the biggest kick. Blue and purple are much more subdued.
Highlighter ink on white paper under UV
I drew a squiggle of each color on a plain white sheet of letter sized paper, underlining each with a black mark to highlight each mark. Under the UV light, you can see that the pink, blue and purple inks aren’t as reactive but the orange, yellow and green fairly jump right off the paper.
Highlighter ink on white paper under Blue
In my setting up the blue light I noticed, to my great surprise, that the orange, yellow and green were also glowing quite energetically! Something to keep in mind if you are looking to light up a case with UV dye in your coolant.