MagicShine SEEMEE 300/400 Bike Taillight,300/400 Lumen Bike Tail Light,360° Visible Smart Brake Sensor IPX6 Waterproof Rear Bike Light for Night Riding

The Light: The SEEMEE 300 is a powerhouse for road safety. The 300-lumen output is incredibly bright, and the 360° downlight is a game-changer for side-on visibility at junctions. It feels solid and the "Smart Brake" sensor is actually responsive rather than just a gimmick. The Support Experience: I ran into an issue where my original unit (purchased June 2025) would show a full charge but refuse to power on. Contacting Magicshine support through Amazon was a bit of a back-and-forth—there was some initial confusion about charging cables and a slight delay due to the Chinese New Year holiday. However, once I provided video evidence of the fault, "Hannah" from their team was very helpful. They quickly arranged a replacement from their UK stock which arrived in just a couple of days. Verdict: Hardware issues can happen with any brand, but Magicshine actually stood by their 1-year warranty and fixed the problem. If you have an issue, just be prepared to provide a clear video of the fault and they will sort you out. Highly recommended for the visibility al

An amazing light. Great brightness and battery life, really extraordinary. I cycle at least 200 Km a week, much of which on A/N roads (in Ireland), great to be so visible. I had a charging issue with my first unit, and it was replaced promptly via great customer service.

I really wish I had read the user reviews beforehand. It seems I’m far from the only one who’s had issues with the quality of the mounts and the lack of customer support. The light itself is excellent: bright, full of useful features, and clearly well-designed. Unfortunately, all of that is let down by a mount that’s cheap, poorly made, and simply not fit for purpose. The Trek seat mount broke after just a few rides over two months, it snapped clean off without warning. I didn’t even realise until I got to work and found the light had fallen off somewhere on the roads of London. To make matters worse, the standard mount doesn’t fit aero seat posts properly, so that’s not a backup option either. It’s incredibly frustrating. For a brand that makes mountain bike lights, you’d expect much more durable mounting hardware. Until they address this flaw and improve customer service, I’d strongly suggest looking elsewhere.

The item was great, especially when riding with a friend behind and the braking function enabled. After around 9 months the light stopped retaining the charge but it wasn't a problem. I contacted the seller and was immediately sent a replacement. Service couldn't have been better. You can buy with confidence from this seller.

Update: the seller has been really helpful by offering a choice between a refund or replacement light. After checking alternatives light I decided that this was still the best light to get for the money and requested a replacement. Very happy with the service so I've changed my rating from 2 to 5 stars. Original review: Good product, worked as advertised for 11 months. But I took it out for one ride when the roads were considerably wet and it broke. I've tried drying it out but it still won't work. Would've been 5 stars if it was more waterproof but I wouldn't recommend with this issue.

Super bright light, just a little too big, weighty. Not sure how it would fair in a drop test.

Great product ! A sophisticated design which makes a rider much safer at night. A downward light is a clever addition. Although I had an issues with original item, a support team from the manufacturer was very quick to respond and sorted it all out . Works beautifully . Highly recommended to everyone who rides at night ..!

My new favourite light. Visible for a long distance, and the LED facing down is eye catching. Well worth the price and great value.

This stand alone tail light does a good job setting itself apart from those that typically get thrown in as add-ons in a set. It's very capable of putting out an amount of light that stands out and will be noticed. Not only that, but the fact that it easily integrates with popular bike computers to allow control and 'networked' behavior it's a good option for people who like to ride in groups. I fully tested it with my aging Garmin 1000. I haven't taken it on a group ride since the season is over, but I have confirmed that all the functions of the light are adjustable from the head unit. The light also turns on and off with the computer. The heavy duty construction of this tail light inspires confidence that it is built to last, and provided it ends up meeting those expectations I can highly recommend this light.

視認性が良くてとても気に入ってます。

This light has some very opinionated design decisions in the software, and to the product folks out there....if you're gonna be opinionated in your design, you're gonna get opinionated reviews. Buckle up, 'cause it's gonna get a little rough. The tl;dr: Excellent hardware that forces high power consumption on you, whether you want it or not, so that instead of up to 11hrs of battery life, you get 2-3 when riding in darkness. (And yes, this is a problem - I don't want to have to charge the battery every single day.) On the plus side: USB-C charging, excellent battery capacity; good battery life* in the mode I use most frequently; many modes; mode memory; quarter-twist mount. Now for that asterisk on the "good battery life": What I want out of a bike taillight is something that flashes stupid-bright so that the doofus in the car coming up behind me looking at their phone has something catch the corner of their eye and get their attention. And this does have an excellent daytime-bright flash mode. All good so far. The problem, though, is that once it starts to get even the slightest bit dark outside, it switches to this mode where it pulse-glows out the back and shines a bright red light directly to the pavement. At no time in my life have I worried about being hit by a car coming at me from below the surface of the pavement. I get that "provide visibility from the side" thing, but guess what - you extend the lens around the side of the housing a centimetre or so and that 300lm flash (that you turned off in favour of some slowly pulsing glow) gets people's attention. "But it's too bright at night", you say? Impossible. Nothing is "too bright" for a bike to get noticed, particularly when it's red. Goal #1 through #20 is "get noticed". So, not only does the light go from a bright flashing "HERE I AM!!!" flash to a dull slowly pulsing light is that there's now TWO LED'S soaking up battery power, so the runtime of the light goes from 11hrs to maybe 3hrs at best. Yay (insert sarcasm emoji here). And if/when the battery does run low, instead of doing what it can to extend that runtime by....you know,....GOING TO THE FLASH MODE THAT LASTS FOR 11 HOURS, it instead glows even brighter so that you notice that your light is running low. Which....ok, great -- the light let you know. But what can you do about it for the remaining hour of riding until you get home...? Nothing. Just accept the fact that your light is gonna go out sooner than necessary. And then it has a brake light function: In theory, you hit the brakes on your bike, and the light shines brighter. There's no wire/sensor like there is on a car, of course, so it has to rely on some electronic sensor. So, I realize this isn't easy. But come on: If you're riding at like 35kph on flat road, peddling at 90rpm or whatever, if your speed varies between 35.8 and 35.5....the brake light should not come on. And yet it does - again just absolutely KILLING the battery life. The best part of all of these "features" is that MagicShine makes absolutely none of it configurable. If you WANT to just keep the low-power super-bright flasher going once it gets dark (and by "dark", I mean roughly half an hour before sunset on a clear day - why?!), instead of the light switching to the highest power consumption mode, well, go buy another light. Because this one won't let you. So I did. In short, this is a great light with TERRIBLE software.

Gran luz trasera.

Excellent light that spent all winter in MN with me - commutes are dark both ways. I bought this after entirely too much research into tail lights, and this one won out for two primary reasons: 1. The listed battery life on this unit is way longer than most tail lights on the market, and I can confirm from use that it does last a long time - weeks between charges with simple commute usage. 2. The downward-facing tracing LED is a brilliant idea that provides both identification and positioning information to drivers when sharing a road. I can’t say I’ve driven past myself, but I certainly feel more comfortable knowing my legs are lit up as they pass. The only feature I wish this had is whatever the syncing tech is to control the tail along with the headlight. I also use the Hori headlight from the same company, and their smaller tail lights without the tracer LED sync up with the remote control. Maybe on the next version. Highly recommend this piece of kit!