GearLight S1 LED Safety Lights Bike Taillights - Clip-On for Boat, Bike, Dog & Runners - Red, Green - Pocket-Sized, Compact, Portable (Pack of 4)

Second update 2/8/19: I unexpectedly received a replacement set of lights from GearLight. They included a MUCH longer screwdriver. Nice suprise, but I was still skeptical. The screwdriver worked with the replacement lights, but I didn't know if they'd hand-picked a light set to send. But I had one light left from my original set, and the screwdriver worked well with that. I took the back all the way off and put it back on to be sure the whole process would work and it did. (One review talked about the clip being an issue, but it wasn't at all.) So, IF the new screwdriver style is included, I'd definitely give these a five star rating. They're super bright and the two flashing options make me much more comfortable that my dog and I will be seen when walking on dark streets. Update 1/12/19: I've had these a little less than four months and the batteries are now dead. I tried to change them with the screw driver included and the screws simply won't turn. Tried a different screw driver with a longer handle, pushing hard while turning, etc., but still no luck. So basically these are over-priced throwaways, prior review: These are under an ounce each, but nice and bright for being seen while running or walking in the dark. The clips grip well and are easy to use. Each light is 2 1/4 inches high and comes with its battery installed, but you get four extra batteries too. I like having a choice of steady light, slow flash and fast flash (but I probably won't use the fast one). I walk or run my dog twice a day, plus take runs without him. There are no sidewalks in my sub, so visibility is extra important. I have a reflective vest, and so does my dog, but I feel a lot safer with two of these on each of us! I don't normally order things on Amazon that only have a few reviews, but these were cheap enough that I thought I'd give them a try. Glad I did!

I had received the product as scheduled and after 4 weeks the light died on me and could not switched off. When we opened the lights they were full of rust. This order was delivered by a reseller from China. I placed another order and I received it from India. Please note that the picture on amazon does not match the actual packaging which created a lot of problems when communicating with GearLight. These lights are the most expensive positioning lights I have purchased but they died miserably full of rust but Gearlight issued a refund ...no questions asked. I am a long distance runner and I must have reliable lights. Hopefully the one from the reseller based in India are a bit better

These seemed expensive at first, but after receiving them I realized they were built very well. The LEDs are very bright and should last a long time, and the units, including the clips, are very sturdy. They also come with good quality Velcro straps to fasten to bikes, strollers, etc. Recommended.

Bright and very practical. Easy on, easy off. I use them on my backpack and clothes after dark for walking in dark areas.

Use them when we take the kids out in the park for biking. The lights indicate when the kids are when it is dark. So we don’t have to worry about losing them in the wood.