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.

I purchased the SEEMEE 300 in July 2025 and was very pleased with its design, brightness, and overall performance. After several months of light use, the unit unfortunately stopped working after a ride in steady rain. I reached out to Magicshine support through Amazon, not really knowing what to expect. The customer service experience was excellent from start to finish. Hannah from Magicshine responded promptly, asked clear and reasonable troubleshooting questions, and carefully reviewed the videos I sent showing that the light would no longer charge or turn on. Communication was polite, professional, and patient throughout, even when an earlier email didn’t go through and needed to be resent. Once it was clear that the unit had failed, Magicshine immediately arranged a replacement without any back-and-forth or pushback. The replacement arrived quickly (one day earlier than the original estimated delivery date), and the process was completely hassle-free. It’s rare these days to see such responsive and fair after-sales support. Magicshine clearly stands behind their products, and that gives me a lot of confidence as a customer. Based on both the quality of the light and the outstanding customer service, I would absolutely recommend the SEEMEE 300 and Magicshine as a company.

Good strong light. I wish the strobe setting blinked faster. I bought it for the battery life and so far (3 mo) it has held up to the time advertised. I ride in the country on back roads and this makes me very visible from behind. Wish it had a clip attachment for my saddle bag - I had to Jerry rig it. But I works .

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

Got the 400 because it connects to the remote that I have that came with the Hori 1300. Syncs perfectly with my lights now and my goodness it is bright. Be careful when it's on High Flash mode. Momentarily blinded when I was testing. Battery lasts longer than anything I have owned even on non-eco mode. Speaking of which, eco mode is only when you really need to save on battery. Very low visibility on that mode. Rather have it on flash than eco mode. Got the Black Friday discount so I got it at a fair deal. LOVE the pulsating, dowfacing 360 degree light!

Best bike light I’ve ever bought! When is dark this thing is bright, it illuminates the whole floor behind you, people can see you a mile away! And it switches to night mode automatically you don’t need to do anything!

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.

I really like this bike light. Neat looking and fits well on my Brompton without impeding folding of the bike. USB charging, various light modes and good brightness. Seems well made and designed. Happy to recommend.

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.

Nice and bright. Better visibility than most rear lights due to the extra downlight. Like it.

Gran luz trasera.