Exposure Lights Sirius MK10 Daybright Front Bike Light

Product Information

Quality Exposure Sirius MK10 Front Light with DayBright will last much longer and perform better than their cheaper counterparts. They are typically made with higher quality materials and are designed to withstand the wear and tear that comes with regular use. Investing in a high-quality Exposure Sirius MK10 Front Light with DayBright means that you won’t have to replace it as frequently, saving you money.

The Daybright mode is an interesting feature that, as the name suggests, is intended to get you seen while riding during the day. It's a pulse pattern that's really bright and noticeable from a long way off – we're talking hundreds of metres – even on a sunny day. There's a DayBright function too (accessible from any of the three constant modes) with two different flashing patterns that will get you noticed during daylight hours. The light has a 7-hour battery charge time and a maximum run time of 36 hours, depending on the mode selected, and there's a fuel gauge to alert you to the remaining battery level so you don't get caught out. In the boxIt’s important to note that when shopping for Lights products, it can be tempting to go for the lowest price possible, but be wary of retailers that offer prices that seem too good to be true. Some less reputable retailers may sell counterfeit or low-quality Exposure Sirius MK10 Front Light with DayBright, which can be dangerous and not perform as well as the genuine product. Choosing a reputable retailer like Chain Reaction Cycles can help ensure that you’re getting a high-quality product at a competitive price. Various programs in the lights can easily be selected to offer a choice of run times and modes so you can find the right one for your ride, be it an all-night adventure or an intense blast. ITM Whether the additional 50 lumens makes a huge difference over the MK9 is debatable, but extra lumens are always appreciated, and Exposure hasn't upped the price. But great as the light is, there are some downsides – most of which centre around the clamp. Although the executions feel super high quality, the split clamp design does make it easy for the two halves to come apart.

Smart Port+ enables the charge port to accept auxiliary accessories such as rear lights, remote switches, Support Cells and use your light as a power bank to charge USB devices. OMS Little LEDs alongside the button shine for a couple of seconds to tell you which mode you're in. Green indicates high, amber is medium and low is red, which is pretty easy to remember. The LEDs then become battery level indicators, again using a traffic light sequence, giving you plenty of opportunity to switch to a low power mode if you're running on fumes. The lowest power constant mode has a run-time of 36hrs so you really shouldn't get caught out. Exposure prints all of the various run-times on the bottom of the aluminium casing, and in my experience they're pretty accurate. The mount isn't aero-bar compatible but fashioning something out of a silicone/rubber strip isn't out of the question, or you could fork out a fiver for Exposure's specific aero-compatible mount. And considering you can get customisation and up to 1,500 lumens from Moon's Rigel Max (also tested by Stu, in 2021) for a tenner less than the Exposure, it's fair to say the Sirius is at the premium end of the market. Smart Port+ Technology - Smart Port+ enables the charge port to accept auxiliary accessories such as rear lights, remote switches, Support Cells and use your light as a power bank to charge USB devices.

Rear Lights

The only downside is that charging is via a dedicated cable rather than the usual universal USB-B cable. This might put some people off as it means you need to carry a dedicated cable rather than rely on the usual one that everyone has everywhere. But the upside is that the charge port is well protected from the weather, as long as you insure that the fiddly rubber cap is shut properly. When not in Reflex programme one, I found programme four was the most suitable for my needs. In programme four on the high setting I managed to get 2 hours 40 minutes of run-time, a full 40 minutes longer than the light’s claimed endurance. There are a number of modes to choose from, both static and flashing, including DayBright, a pulse that cuts through distractions in the brightest sunlight. Intelligent Thermal Management prevents the light from overheating by reducing power to the LEDs when they go over the optimum temperature. Once cool again, the output will return to previous levels.

I've never felt like I've needed any more light for the commute than the Sirius offers. You get good side visibility too, courtesy of a lens that extends well forward of the body of the light, a hood in the aluminium casing preventing any of that light shining up into your eyes. On the other hand, I would want a wider beam for a fast training ride out in the lanes, for which the Sirius isn't intended. Day Bright: Bespoke pulse pattern designed for daylight use which is more conspicuous than a regular pulse and visible over a kilometre away, even in the brightest conditions. DayBright mode will you noticed. Be Seen be Safe Exposure does list the basic numbers. This light puts out 1600 lumens at full power and has a 10,200 mAh Li-Ion battery that will sustain it for two hours at that power level. From there, the key statement is "Burn time and lumen output are directly proportional, if you double the run time, you halve the lumen output." That's your guidance for figuring out what you get across the seven programs that feature a mix of three, and sometimes two, power levels.

Patented circuitry within the light will reduce power to the LEDs, if they go beyond the optimum temperature, keeping the light as efficient as possible to maximise output and battery capacity. Once the light has cooled, the power is automatically restored. Reakt The complex lower optic gives a really good spread of broad distortion- and shadow-free light from the front wheel out to where it blends smoothly with the spot too. That gives plenty of roadside context and ‘corner look around’ if things get twisty. The lowest power setting in each mode only uses the lower LED to prevent the spot from potentially dazzling drivers, too. Alternatively, the Strada MK10 Aktiv has a light sensor that automatically dims the light as soon as it senses oncoming traffic. Optimised Mode Selector - Various programs in the lights can easily be selected to offer a choice of run times and modes so you can find the right one for your ride, be it an all-night adventure or an intense blast.