These bike lights are super well-designed with an original concept that means they can be securely fixed onto any part of your bike, helmet or person. There are lots of options to vary the flashing and luminosity of the light. My favourite is the brightest setting which appears to be fifty times brighter than any other bike light I've owned - so I feel more safe when zipping round the city. Apace Vision's customer service is one I wish every company would learn from. I had an enquiry and they were ultra prompt and sorted me out with great good grace and and ultimate professionalism. I can't recommend this light and this company too highly. Worth every penny/ dime!

I've been using this light for almost 2 years, and it has never failed me. It's very bright-I use it on flash, and it makes me feel safer and much more visible. The mounting system and rubber on the back make it versatile and easy to fit it on a number of different surfaces, i.e., seat post, rack, etc. The battery lasts multiple, multi-hour rides, and charges easily and quickly. If I needed another tail light I would buy this one again in a second, with no hesitation. Highly recommend.

This is one of my all-time favorite tail lights. Clever, reliable, durable bands and fittings make it fit pretty much any rear rack or seat post. There are many modes to click through -- flashing modes of varying speeds and brightness, a pulsing mode, and some steady modes, including blazingly bright. I turn on this light whenever I have to ride at dusk or near traffic. Even in broad daylight it gets attention. Charges quickly via USB cable, indicator turns from red to green when fully charged. Great customer service, they reply quickly to queries.

Works great, easy to attach, very Bright.Update: Started using it in December its January 31 now, I use it every night 8 min ride to and from work 3 days a week plus misc riding now and then. It just today started flashing indicating it needed charged.I bought two so regardless of how long it takes to charge up I'll be good.Worth every penny in my opinion!!

Avevo già acquistato il modello precedente ma questo è più performante, non posso ancora esprimere un giudizio sull'autonomia della batteria perché non ho ancora usato tutta la prima carica completa

Great product! Super bright, I like the fact that you can be seen from the sides. I highly recommend this product.

I bike often. Unfortunately, even with wearing bright clothes and having fancy brand name blinky lights front and rear, I am still invisible at times on the road. To up the "can you see me" factor, I have added lights front and rear. The company that makes this exceptionally bright red light, also makes an obnoxious white light for the front of the bike (obnoxious meaning in strobe mode it hurts the eyes if looked at for too long). After using that one in addition to the other brand name light on the front and have had much success with it, I decided I need another obnoxious red light in the back of the bike. Ta da - exactly what my bike was missing. This red light is easy to use, mount, and charge. Mine is mounted on the seat post below the reflector, within reach of turning on and changing the setting. Well worth the cost. Long lasting too. Although, I charge all my lights after 3 rides (most rides are 2.5hrs), so I have yet to witness this light or the front light run low on battery. Highly recommend and yes, I would definitely buy again.

They didn’t fit on our bikes so now we have no back light.👎🏻🤦🏼‍♂️😡😢😤

Después de casi 1 mes usandolo a diario, solo puedo hablar maravillas sobre la luz.Primero de todo decir que es altamente visible tanto de día como de noche. A brillo máximo es totalmente cegadora jejeje y en modo parpadeo diurno se ve a muchisima distancia, además la llevo en el casco, con lo que no hay excusa para decir que no me han visto.La duración de batería es lo suficientemente buena como para olvidarse totalmente de ella, y no exagero. La opción que mas dura según el fabricante son 45h y la que menos dura son 2h (opción que nunca vais a usar). En modo parpadeo diurno son 15h.A continuación os pongo la tabla de duración de batería según su modo, que no lo he encontrado por ningún lado, ni en la web del fabricante, pero si viene en las instrucciones. También indico como funciona cada modo.Low: 12h Luz fija al mínimo brillo, de noche incluso deslumbra.Medium: 6.5h Luz fija con brillo medio, descartado usarlo de noche, de día ya se veHigh: 2h Luz fija con brillo máximo, de día imposible que no te veanSlow flash: 45h Modo parpadeo con mínimo brillo y un ritmo un poco más pausado que el parpadeo diurno (aunque es el tipico ritmo parpadeo), de noche se ve muchisimo, ningún pero a ponerle, es el modo que más uso.Smart Flash: 7h La luz tiene 2 tiras de led, en este modo se enciende una y otra alternativamente con brillo máximoDayBright Flash: 15h Parpadeo con brillo máximo y flash rápidoBritePulse: 4.5h Modo respiración, sube al brillo máximo y baja al mínimo, no está apagada nunca.Según se pulsa el botón, cambia de un modo al otro en este mismo órden.Yo lo he usado durante unas 20h en modo "slow flash" y la cargué más por miedo a necesidad jejejeEn modo "low" lo he llevado unas 8h y lo mismo, sin quejarse.En "daybright flash" también unas cerca de 10h.La luz tiene mucho ángulo, te ven desde todos lados.Viene con bastantes gomas y almohadillas de esas por si se estropea algunaLleva un led rojo indicando cuando se está cargando que cambia a verde cuando termina. Imagino que parpaderará rojo cuando esté apunto de gastarse la batería, nunca ha llegado a ocurrir jejeMuy contento con la compra, por ahora repetiría sin dudarlo

See Five year review update at bottom...Form and function:First if you have an aero seatpost, the included mount pads might not be ideal. You can probably find a way to make it mount. It's also a bit too large for most seat stays and it doesn't easily mount on saddle rails or saddle bags either. Anything is possible with some creativity, but it's really best for round seat posts. It does include plenty of mounting pads and bands, and a nice little pouch. To me the slightly large size is good. It allows high total ouput without high pinpoint intensity when viewed up close. That's less blinding and easier to focus on and locate, while still just as visible at a distance.It weighs about 52 grams including the pad and band. It seems pretty rain proof. It generally looks and feels like a good quality gadget.It charges fully in about two hours (I didn't monitor it closely) consistent with 0.5A charging claims.The daybright mode is very nice, very visible in the daytime. My riding buddies commented on seeing it far up the road in the daytime. I think it's using the full 100 lumens, or a good fraction of it, in short pulses to get attention and last long. I wouldn't use that at night. The pulse mode is interesting for night. I am not a fan of blinky modes at night, but pulse dims and brightens smoothly without going off, improving ability to focus on the light while still getting some improved peak brightness without all of the runtime reduction of a steady bright mode.Mode claims:It comes with a manual with these modes listed:Low 12 hoursMedium 6.5 hoursHigh 2 hoursSlow flash 45 hours (a standard on-off flash, low power)Smart flash(TM) 7 hours (Similar to Slow flash but brighter)DayBright Flash(TM) 15 hours (Short high intensity pulses)BritePulse(TM) 4.5 hours (Pulsing wave pattern in time, never off)Performance testing:The good:I've actually done some fairly quantitative testing on this light. I have no absolute reference, but on high I measure it about twice the total output (scattered light from all directions) of a 50-lumen claimed moon MK-II, and has a similar beam pattern. That's a smaller and lighter-weight light that fits on seat-stays and has lower claimed runtime and obviously brightness. Both lights drop off in brightness some as voltage depletes, dropping to about 70% eventually. It's pretty common for lights not to have true voltage regulation, which requires a little more electronics. The medium steady mode is about 1/4 the output of the high mode initially, and the low mode is about 1/8. This all seems fine and in line with claims relative to at least one competitor.Also I tried to test the daybright mode but not using suitable equipment for pulsed output. By eye, close up, it appears not as bright as the high mode, but perception of fast pulses is complicated. I was able to get readings that weren't far off of full brightness in spite of not have fast triggered sensors, and as mentioned it's very visible from a distance.The ugly:After 20 minutes on the high steady mode, aside from the initial voltage-related drop to about 75% brightness, it also steps down again to about 75% of that from a hard-coded timed step-down, and it steps down by a little over twice again after 1 hour and 20 mintues, reaching about 20% of its initial brightness at that point. I get a total of almost 3 hours of runtime before switching to the battery saving blink mode. That lasts about 1.25 hours (they claim 30 minutes, and I'm happy that it's longer).The two steps are not thermal or voltage related. They are just hard-coded timing steps and it would seem they exist to extend runtime while still getting the initial high lumen output. The step downs are even done in multiple steps a few seconds apart, making it less likely that you'll realize this. If I reset the light after each programmed step down, it follows a similar output curve as the Moon light, and gets a runtime of 1.5 hours, not the claimed 2 hours. As it stands the high mode is like a "turbo boost". You set it when you need to get through a few miles of dense city traffic but it will drop back down after that. To me, that seems a bit like cheating on runtime claims, or at best not explained up front, and I also just find it as not an ideal configuration personally. If I want to use high for a short time I'll do that and if I need low for a longer time, I'll change to low.To their credit the customer support manager has been very responsive and sympathetic. He did discuss with their manufacturers and verify the issue, and I think he's sincere in saying he wants to fix this. I don't think they can fix it and still get a claimed 2hr runtime on high. I think at 1.5 hours, it's still a great light, especially at this price, but they should remove the step downs. In their defense, their most direct competitor (over three times the promotional Apace price) has the same battery capacity and their claimed runtimes don't add up. It seems they may be doing similar tricks, and I understand the need to compete to sell lights.Overall:A long running light with great day and night capabilities, especially for the price, but some limitations in mounting options and some unecessarily dubious performance claims that might not hold to up to what you'd expect from the description. Customer service seems sincere in addressing it, and the light can still be a great buy, especially at the promotional price of about 3x less than the competitor.Five year review update:I have used this light probably six days a week for five years. Although I never re-measured it, it still had good run times. After about 4 years the usb c plug broke off of the circuit board it attaches to. After cracking the glue to open the light I was able to fix that and re-seal it. This can be avoided by avoiding stress on the plug when charging. I often charged it on the bike with the light twisted to expose the plug, but creating a little pressure. It's not super strong though, and thicker solder connection to the plug housing (which I added) could have improved this.But now after 5 years, it won't charge anymore. This appears to be a different issue as the usb connection is still solid. The light operates after first bypassing the board to charge the battery manually, but the usb charging circuit seems dead. Anyway, 4 or 5 years isn't bad, so I bought a new one.