I expected an upgrade from the original D'lites and was pretty disappointed. The tips are ok and fit well enough and are made of a softer material than the originals. You can actually trim these to fit your thumb getting a better fit than the hard original tips. The light is as bright or brighter than the original but the issue is that the light unit will not stay attached inside the thumb. I don't have a solution to make them stay attached. If anyone else has an answer please let me know. If I were the company, one of my priorities would be to find a way to fix this issue.

I love this effect. Sure it's simple. Possibly over exposed. But I love it. So much fun. However, I stopped using them in performance. There is another brand, (which Rocco was directly tied to and identified with), that has been on the market for ages. They didn't fit adults well, had inconsistencies in brightness and had other various and annoying issues; not the least of which was cost. Though it wouldn't break the bank, the cost has been enough that I'd rather spend that money on stronger magic than replacing old gimmicks.
...But all that has changed with Prisma Lites. A better fit for adults and easily customizable, if necessary or so desired. The gimmick is more "realistic" looking and far more comfortable to wear. The lights are bright and operation couldn't be easier.
Rocco even has a 22 minute video showing various uses for the gimmicks. The packaging is beautiful. A hard drawer box with custom foam molding inside to keep them secure. They even come with a plastic tab inside to keep the battery and connector separate and prevent any accidental activation and wear of the battery prior to them arriving to you.
This is far superior to other similar products utilizing this gimmick, (and Rocco's image). From how they look pre- and post-activation; to fit; to light brightness; and even packaging. ...And at nearly half the price, (affordable enough to buy backups and pairs of multiple colors). Rocco has a winner with Prisma Lites.