Exposure Lights Sirius MK10 Daybright Front Bike Light

Product Information

Options for everyone. Depending on your needs you could have less complexity but the trade-off would be someone else not getting what they need. All applicable customs and import duties and any other charges are the responsibility of the customer.

Bespoke pulse pattern designed for daylight use which is more conspicuous than a regular pulse and visible from over a kilometre away, even in the brightest conditions. DayBright mode will get you noticed. Be Seen Be Safe. 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

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. 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. Rear lighting that flares up automatically under braking. It can also intelligently adapt to the surrounding ambient light conditions to maintain maximum contrast and visibility, for example brightening for street lit areas and moving into sunlight from shade. Fuel Gauge Emma’s first encounters with a road bike were in between swimming and running. Soon after competing for GB in the World Age Group Triathlon Championships in Edmonton in 2001 she saw the light and decided to focus on cycling. 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+ 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. Fuel Gauge 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 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 box Despite the light’s visual bulk and relative high weight, it was impressively stable even over the roughest terrain I could find; not shaking, slipping or coming loose at all. You can see the two different types of lights Exposure uses for the road beam pattern and you can also see the sensor for headlights in the bottom right (Image credit: Josh Ross)ITM: 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 cooled the output is automatically restored. The light comes from a white XPL2 Cree LED and Exposure claims a maximum of 750 lumens. The beam is very round and quite concentrated. It punches a big hole into the darkness but you don't get the spread that you do with some rivals. Delivery timescales are esimates in working days; Public Holidays, Saturday's and Sunday's are NOT classed as working days. 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 In The Box

Also, although this light is road specific (there are the Toro and MaXx for off-road) the bar clamp is sized for a 35mm bar. These are increasingly common for mountain bikes, but road bars tend to be 31.8mm. This means that in addition to the two halves of the split clamp, you have two spacers to keep control of as well.

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Shape and beam quality is excellent. Keeps it from feeling like riding in a tunnel and there’s a fairly tight cutoff. I would like to see a bit higher max lumens though. The OLED display that gives you mode, run time and recharge information (Image credit: Guy Kesteven)