Edit: Their customer service reached out to us and sent some more lights to us to make up for the ones that didn't work. Out of the new batch there were still a few that didn't work, but overall their customer service went above and beyond to make things right. Our kids love these things and it made for a great glow in the dark party and favors to hand out to guests

The only reason I rated this as a 2 is because the kids LOVE these lights. I ordered a hundred pack from another carrier last month and every single one of them worked. I thought I ordered from the same carrier, but apparently not. 1/4 of them did not work. I was really disappointed because they were for my son's birthday party today. I did not get what I paid for.

Great, what I expected

Out of 100 about 8 failed, a couple completely and others would flicker a bit then go out. The ones that work are bright. They are super tiny, and as far as attaching to fingers it's just a little rubber band that holds the tiny flashlight on the finger. It works but you've got a chunky plastic object sitting on your finger. The rubber band can also pop off so definitely not appropriate for the littlest ones. Good value though, even at that fail level, given the price.

I like the bracelets, but a little more reserved about the finger lights. The finger lights are good when they are working.

Pros
Bracelets are not the flimsy thin type that don't glow very well. On the thicker side and glow brightly, even in lit indoor lighting, though best in the dark of course.
While the thickness make it a little difficult to put on yourself on bigger wrists, they should fit almost all wrist types, even adults.
Finger lights are a fun addition and colors are great for anytime play, or even contain red, white, and blue for patriotic use, or red and green for Christmas. Nice ideas to play around with.

Cons
Have nothing negative on the bracelets, but had a couple issues with the finger lights, which is why it is reviewed at 4 stars instead of 5:
Finger lights are held on by a rubber band, which is not bad in itself, but it is designed to go on your finger with the switch on the side your finger is supposed to be. I don't understand this design. It makes it a bit uncomfortable and easy to accidentally switch it off moving against your finger.
The casings are not held together very well. They don't come apart, but they don't press the batteries together well enough and the lights keep going off and have to play around with some of them to try and get them to work right, pressing the casing together a bit until you can get it to stay on and hope it doesn't go back off again. This can get a bit annoying at times.

These rings were purchased for 10 year olds to wear at my daughter's glow in the dark skating party. We loved the jelly, which made them much more comfortable to wear than some of the plastic products out there. The rings were a colorful variety, just as pictured in the description. The flashing lights are also colorful and very bright. Out of the 36 rings, only 1 was a complete dud. My daughter thought some of them weren't working, but they just firmer push directly on the LED component. The part that actually wraps around your finger does seem a little flimsy compared to the light up part of the ring, but so far none have broken trying them on. I will update the post after the birthday party if they end up ripping. But for now, I highly recommend these fun jelly rings!