RolkemLumo UV-Fluorescent Powder Food Color, 10-Milliliter-Volume Lunar Yellow

It does react to the blacklight, but it may have caused stomach issues.I tried this in some soft set gelatin for a cocktail, about 1/8 tsp per 4 oz of liquid and I used a couple of spoonfuls of it in a drink to test it. I didn't even finish the cocktail, had just a couple of sips, but I was quite sick hours later. That was Sunday, it is not Wednesday, and I am still feeling ill. This is the only thing I think could be the culprit, because my partner and I eat the same foods, and he is not sick. He did not have any of the drink.

Very bright color just a dab goes a very long way.

Added about a teaspoon to a large batch of bright pink cream cheese frosting and it made these cupcakes glow beautifully under a blacklight. Some great YouTube videos on Rolkem help show how to add it. Highly recommend getting the color of the icing or fondant close to the desired color before adding to save on the powder and get a great effect in the light and blacklight.

I used this to paint on the green of the slime on the berries. It glowed under a black light and blue LED lights. I was sent the wrong color at first but was able to send back for the correct color easily and arrived just in time.

I ordered the pink and the yellow powders. The pink was surprisingly more “glow in the dark” but they both worked under Black light. I’d recommend coloring your buttercream first, then add in the powder. Little by little.

This is just horrible I bought this and waited forever for it to arrive and when it did arrive it arrived all in a bag and I couldn’t even get enough out of the container that was suppose to be sealed to try it! Sad!