I bought the blacklight bubbles for our haunt last year and I was very impressed. Bubbles at night are basically invisible and useless but these were very visible and the TOTs were drawn to them.
One caveat - do not use them on any smooth surfaces (or let the bubbles float over them) such as a garage floor. The fluid is pretty slick and someone could easily fall. I put ours out over the grass and didn't have any troubles.
The bubbles are clear and look normal until you turn the blacklight on. We had our blacklight on a remote and when a TOT came up to the house we'd hit the power. It looks like the bubbles just appear all at once.
Great company, family owned I believe. They were patient with all of my questions and my bubbles came in two days.
http://www.teknobubbles.com/
Blacklight bubbles - totally worth it
Linear Mode
