Yellow UV Reactive Water Dye

These worked great

These worked exactly how I wanted them to for my Halloween decorations. I put them in potion bottles with names like Deadly Nightshade, Worm Wart, and Frog's Breath and they looked GREAT! Although, I will mention that the purple ended up being more hot pink, (I would have preferred it to be more purple but it still glowed really well, and the yellow actually glows orange; however, that was the color I wanted anyway (they don't make an orange). The green was the best by far, extremely bright neon green glow, which again was exactly what I was looking for. Thanks Glo Effex! Also, I had mistakenly ordered the blue instead of the green, Glo Effex was great by a) responding immediately and b) shipping me the color I actually meant to order. A+ customer service!

Bright yellow

Used in a halloween display for 'radioactive' effect and it worked great. Green also worked great. Purple and blue are less intense but still got the effect I was going for.

UV Photography

I purchased four Glo Effex dies (green, yellow, red, purple) for the use with UV/Black light photography. They work very well and appear to have a long shelf-life.