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 SEEMEE 300 is a capable and bright light with multiple functions and outstanding battery life. I have other high-quality lights (NiteRider) and this one rates as well as those, with the caveat being that this light is quite bulky, but with the kind of battery life it packs, I can't complain. It's not like I'm a professional racer who's shaving off grams of weight from my bike for competitiveness. So, a little bigger light isn't too big of a deal, it's not distracting and it doesn't really compromise aerodynamics (again, see sentence about NOT being a pro racer). The price of the light is competitive with upper-end brands, and I'm a firm believer of "You get what you pay for...". I'm quite happy with this light, and again the battery life is proving to be spectacular! I've owned it for over a week and after its initial charging, and 90 to 130 minute bike rides 6 days a week, it's not showing any need of recharging. Though after today's ride, I suppose I will just because I have to charge my headlight and head unit anyhow. Color me impressed. With multiple pattern flashes and settings, this tail light is suited for 99% of the riders out there who care about being seen by others and by drivers. I would purchase this light again if I needed to, very much worth the cost! Five stars.

Great light if not the best, it has everything in tiny small package. The battery life is med, so you have to charge it before each ride also it depends on what settings you have it on. You will not be disappointed by this one. Mounting is great. I mounted it to the seat post. It’s very bright, it has sensors it can be synchronized with headlight like hori1300s which I did and I switche them both on and off from the switch button that came with hori1300s, both of these lights are the best combo you ever need

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!

Really cool light. The smart-brake mode works great, just apply your brakes and the light illuminates to brightest setting. The quality is great. I feel confident riding with this light at night. The modes are not exactly intuitive but for the money and features I can get over it.

Update 01 DEC 2025: Much to my surprise, Magicshine reached out and offered my money back. Well, the light “works” but I had to create a custom mount. Instead, I asked for another light as I need another bright tail light. Now I have two and am building another custom bracket. The light is that good, I don’t mind spending time making it work. It’s your call. If you have to mount the light anywhere other than the seatpost, you will have to get creative (added photos for reference). See my original review below for details. I’m adding a star back due to customer support. Oh, Magicshine claims to be working on better mounts, and I believe them after seeing their new Hori 1300 light with a Garmin mount. Hope this helps. ————————————————————— First, the good: Brightest tail light I own, and I’ve owned many. Great side and rear visibility day and night. Great battery life. Near perfect design. The bad: The mount really ruins this fabulous light. Why? Because it only mounts to the bike seat or seat post, and it does so in a flimsy, non-standard way. In other words you cannot mount this light on a rack or vertical bike part…Only angled seat tubes. Who on Earth made this design choice? Every other light I own easily adjusts to anything, allowing mounting to a rack, pack, rear triangle, seat post, helmet, etc. The good lights feature adjustments to aim the light so cars can see it. With a non-adjustable angle built into the mount, the light either angles up towards the sky or down to the road if mounted on anything other than the seat post. No amount of brightness makes up for a misaligned light. Worse yet, if you ride with a trunk bag, you can’t use a seat light because your bag blocks the light. Magicshine gives you zero options for any other mounting options, so you either get creative or return the light. Also, all my other lights have a secure quick release design that is trustworthy. This quick mount just doesn’t inspire confidence. Why not use a standard Garmin or Planet Bike Superflash mounting design??? Ugh. Magic shine, you were so close to perfection…but the mount is such a weak point. Me? I had to make a custom mount with glue and plastic since there is zero vertical adjustability. I shouldn’t have to engineer a solution because Magicshine’s designers couldn’t get it right. The light is too expensive to justify such a brain-dead, inflexible mount. It’s your call. If you ride with just spandex on your bike, this light will work on your seat post. Anything else may block or mis-aim the light, and no amount of lumens can correct for this. Light = perfection Mount = disaster

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.

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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

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.