DirectGlow 12 Invisible Ink Markers & 4 UV LED Lights UltraViolet Blacklight Pens Blue Red Yellow Assorted

There are really only 2 colors since the "yellow" is almost indistinguishable from the blue once the ink is dry.Other then that, I'm pretty happy with them.

The kids are having fun right in secret notes to each other that seems high quality should last a while

I’ve bought other brands of these kind of markers before. I’m not in love with this brand. Only one of them came out good. The yellow was thick and bright. The others were very thin and light. I did like the black light key chain that came with it. Still there are better brands out there. I wouldn’t buy these again

These strips work. I no longer feel like I'm going to slip in the tub.

The ink was alright but the felt tips wore down quickly. Was able to finish project though. But bad if you don't use them a much as I needed to.

Keep them in the packages until ready to use. Store them lid down.They're bright, colorful & fun.

I was pretty excited when these arrived but soon was disappointed. Out of the markers the blue ones were all good they left thick vivid lines and looked really good under the black light. The green ones were on the color was vivid under the black light but were really thin and the lines were not that thick when used. The red ones are the ones that disappointed me. All three of them were totally dried out and I couldn’t even use them so can’t tell u how they were other than that. Can’t return them because of some policy about flammable materials not being able to be returned to amazon. So buy them for sure just be aware they may be dried out by the time u get them!

I used these markers to decorate for Halloween. We drew spooky symbols on the walls of our patio and our front door and lit them with a black light. They are completely invisible when not activated by the black light. They resisted rain. I was only able to remove the marks (to make corrections) with a magic sponge.