Sunspeed USB Rechargeable LED Bike Light Sets - Super Bright and Waterproof

UPDATE - NOVEMBER 2016: I was contacted by the seller to address the problems I described below. They were very helpful and offered to replace the rear lights for me. There was a delay of about four weeks as the lights were shipped directly from the factory, but I was kept informed as to the progress of the order and provided with a tracking number.The new lights have now arrived and so far so good. I have only had one ride in the rain since I fitted them and they seem fine. I should say that having left the original lights on a windowsill above a radiator for a couple of days, both have since come back to life. Perhaps I can keep those for use in the summer months.With respect to the front light - I applied a tiny amount of silicone sealant where the lens meets the front ring using a cotton bud, along with a very fine coat of moly grease to the screw threads. This appears to have stopped any water ingress.ORIGINAL REVIEW:I really like these lights. The idea of all my lights being rechargeable via USB whilst I'm at my desk was a big factor in my decision to buy them. For the last couple of months they have been great for riding in early mornings and late at night, and I've received some positive comments from other road users about how visible they are.Unfortunately, after only about three rides in the rain, one of the rear lights has let in water and stopped working. The other rear light randomly switched itself on at my desk and I couldn't switch it off. After I tapped it against the palm of my hand, several water drops appeared in my hand. I have taken a few photos to show the water droplets on the inside of the lens cover.I then disassembled the front light and found a tiny amount of water inside the lens ring too. I'm confident that I could sort this myself with a tiny amount of silicone sealant around the outside edge of the lens, but a rubber washer could really be needed here too.Having left the rear lights in the warm air from my computer's fan, one of them has now started working again, but there are still some water droplets on the inside of the lens cover.It's possible I may have got a bad batch, and other people may not have this problem. I really want to like them, but based on my experience I'm afraid I can't recommend them if you plan on riding in the rain. As I'm now outside the Amazon returns window, I guess I'll have to look elsewhere.

The kit comes in an excellent presentation box, with the front torch, handlebar mount (with 2 rubber spacers), 2 USB rechargeable 18560 Li-ion batteries, an adapter to use 3 x AAA batteries in place of the Li-ion, 2 rear USB rechargeable lights and a micro USB cable.All the batteries come partially charged if you need to use them straight away, but about an hour in a USB port makes sure that they're at full capacity.On my handlebars (about 7.5cm diameter) the mount is a little loose, even with the 2 rubber spacers, so it drops when going over bumps. An extra spacer from an old mount allows it to be tightened up enough to keep it in place. Once the torch is slid into place and the mount tightened up, I've no concern that it'll fall out.If you have them, the torch will take standard 18650 Li-ion batteries with a higher capacity than the ones supplied (1400mAh), but if you don't these can be plugged straight into a computer USP port or wall plug and charged. The integrated LED changes from red when charging to blue when fully charged.It has 3 settings, high, low and flashing (which is essentially a strobe mode). The high is great for lighting your way along an unlit road and the strobe is ideal for daytime use as a 'be seen' light, although it would be better if the strobe rate was a bit slower.The switch is a reverse clicky, so can't be half pressed for momentary on, but when it's switched on, a half press switches between modes: High --> Low --> Strobe. Switching it completely off also activates the next mode when it's switched back on. It also has a memory for the last mode used, no matter how long it's switched off.The beam is adjustable, twisting the head changes it between a spot and a flood. Oddly, the very front of the torch which holds the lens in place can be unscrewed and there is no o-ring seal on the threads, so hopefully this won't compromise the waterproofing of the torch.The battery tube is accessed by unscrewing the tail of the torch, these threads have an o-ring to seal the tube, not sure I'd drop it into water to test the seal, but it it should handle the British weather no problem.The rear lights come with a metal housing attached to a rubber band that is passed around a post and a plastic clip hooked into it to hold it in place. The body of the light unscrews to access the micro USB port for charging (see photo), again the threads are protected by an o-ring seal once screwed into place. The finish on the back of the lights isn't the best, with some excess glue visible, but it doesn't affect the performance at all and is fine at this price.This light also has 3 modes, On, fast flash and slow flash, these are cycled thorough by pressing the red plastic of the light itself.When charging an integrated LED changes from green when charging to red when fully charge.I've not managed to exhaust the 18650 batteries yet, but the rear lights have died on me a couple of times, therefore it's handy to have a spare to carry with me.I'd highly recommend this kit.

Note: I only used the front light. I already had a rear light that worked adequately, and the one that came with this one did not seem to be particularly better enough for me to change. In fact, compared to the high quality of the front light, the rear just seems like an afterthought. So my comments below are on the front light:This light works really well on my bike. i have to cycle through some dark paths at night and the light is nicely bright enough to light the way, even in pitch darkness and through fogs. The light itself is nice and study, giving it a high quality feel. It also works brilliantly as a handheld torch, which I also use when walking without my bike in the dark. The adjustable zoom is good as well, although not that usable while biking, you'd probably have to stop or slow down if you want to change the zoom.The USB rechargeable battery is a nice convenience touch, although I haven't had to recharge it yet (been using it about a week now)The only problem I had was with the mounting, which did not grip well enough and had a tendency to slip when I go over any bumps, leading to the light pointing down. This seems to be a common problem when reading to other reviews. Since I noticed that this tended to happen because the light would stick out quite a bit over the wrong (therefore the center of gravity was off and it was quite heavy over the front), what did help was (a) turning the mount the other way and putting the light in the middle, so the center of gravity is more balanced on the bike handle, and (b) putting it over this little notch on my bike handle where the handlebars meet the center frame, which seems to create more friction. Otherwise, I could imagine putting some tape on the handle bar to create more friction would help.