I love these things! I got them as a gift about a year ago, and they are still going strong. I got two pink strands, and installation was pretty simple. I bike at night at least once a week, for at least 15 minutes, and my lights are still doing great with the original batteries I added. They are VERY bright at night and give me visibility on poorly lit small-town streets, which is exactly why I wanted them. It makes me way more visible than my headlight and taillight ever did. I loved them so much, I bought them in green for a friend of mine, for her birthday.

I live in SoCal, so not a ton of rain, but we actually had a pretty wet winter this past year and my bike sat out in the rain more than a few times, with no appreciable impact on the lights.

As an added bonus, they look super cool, and I almost feel like I'm riding a TRON Lightcycle when I'm cruising in these...plus I get compliments all the time! People walking past are always shouting "cool wheels!" I've also had several people roll down their car windows to yell "I like your bike lights!" or something similar as they drive past. While it always scares me a little at first, I appreciate that people are so overwhelmed by my awesome wheel lights that they want to share. WAY preferable to the obnoxious catcalls I get during the day.

TL;DR--love them, would buy again.

Have only had them on for 2 days, so I can't speak to their longevity - but so far, I love them!

I got the blue lights. I knew what to expect from reviews.

I'm not mechanically-minded, so I was a bit nervous at first. The diagramed instructions that come with it tell you everything you need to know / do. Important details are in CAPITAL letters, too. Sounds silly but it helps.

SUMMARY: each of these steps is illustrated and described in detail on the page that comes with the lights:
open battery box (4 screws) - pop in batteries (3 AA)
screw battery box closed again
remove attachment plate (2 screws)
line attachment plate up with 2 spokes of the bike wheel
screw attachment plate on to box again, check for secure result
weave the light strand around spokes the way you want it (I did a spiral to the outer rim)
plug end of light strand in into knob at start of strand
secure as desired with the enclosed zip-ties (SO easy!)

I only listed all that so you know what "some assemby required" will look like. It was kinda fun.

You can turn them on and see them in the day, and they're ok. On our ride last night in the dark, they were gorgeous! I'm glad I put them on the front wheel where I can see them. They look SO cool. You turn them on/off by pushing a small button on the front of the battery box, it's ridiculously easy. They do look like the photo here.

As long as these last awhile, they're 5/5 for me.

p.s. I handled them delicately to put them on;; they might not do as well if you manhandle them. Once in place, though, they have a nice plastic tubing to protect them. So... we'll see!

Ordered a set of white Brightz lights for my bike. Order was delivered quickly and well packaged. Took about an hour to install. Front wheel went much faster than back once I figured out placement of battery pack. Process was slightly harder than normal as I have front and rear disc brakes that I had tow work around. Initially only one wheel would light, but I replaced batteries and got the second one to work. The problem I have is that even though I ordered 2 white lights, one of them is definitely a blueish hue. Box says white, but looking at both there is a distinct difference. Not a huge deal, but I would like to have matching lights since that is what I purchased. All in all an OK product. Probably would not order again or recommend to friends since there appears to be some QC issues. If I had gotten 2 matching lights, I would likely rate 4-5 stars.

These are nice and bright at night. You can't see them in the daytime. These are designed to fit into the spokes of wheels 20" or larger, but I bought these for a child's bike for a 4-year-old. We simply wrapped them around the frame of the bike and secured everything with a handful of cable ties. Boom -- a fancy-schmancy rainbow light up bike.

Brightz or sellers: please make the description about the colors clear. Much of the writing and sounds like it is available in 8 solid colors and color morphing---which implies 9 settings you can choose from. There's just -one- setting: always-on color morphing where it cycles through the colors on its own schedule. Please clarify this in the product details. Thanks.

Bought these blue ones for a Christmas gift but I already have a pink set for my bike and they look awesome. Easy to install. You can cut to fit but very little waste on a 26 inch wheel. Highly recommend for anyone who rides at night or dusk. I'm attaching a pic of my pink ones for reference since the blue ones are being gift wrapped for Xmas 2015. (Note, I have an extra light on the bike frame, this review is for the wheel lights only and you need 1 box for each wheel)