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. 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.

It’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. 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. Thanks to Exposure's Optimised Mode Selector (OMS), all of these settings are customisable; that's to say, you can extend run-times by reducing the lumens.

All applicable customs and import duties and any other charges are the responsibility of the customer. Exposure's Sirius MK7 Daybright is an easy-to-use light that's suitable for commuting – and more – and for getting you noticed in daylight. Various different programs allow you to choose the balance between brightness and run-time that best suits your needs, and the overall build standard is very high. Exposure’s solution to this is to have a variety of “programs”, each with only a handful of settings in. This way there are over 20 settings in total, but the most you’ll ever have to cycle through is three. The ride

The clamping system is easy to use and mount to the bars with the single Allen bolt. The light is just as easy to attach to the clamp and removal is totally intuitive. 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.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. SPT+: 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. What about the actual light quality though? The road-specific beam pattern on the Strada uses two different beams that combine. One is a typical round shape that stays centred without much width. The other has a letterbox shape that extends much farther from the centre. The effect of the two combined is a letterbox with a bright centre. The cutoff at the top and bottom is fairly sharp and the design is symmetrical so it works no matter which way up the light is mounted. 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.

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. The OLED display that gives you mode, run time and recharge information (Image credit: Guy Kesteven) 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. 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. In The Box 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.That doesn't mean it's perfect though. Although the DC power port works, there's no need for it. It's entirely possible to create a sealed connection with a USB-C cable and save everyone the hassle of dealing with something that isn't as common. As well thought out as the rest of the light is, requiring adapters doesn't make the same sense. The same basic thinking goes for the burn time vs power discussion. I did the research and helped you with the maths so that we can both understand how to calculate the desired runtime vs power. It doesn't make a ton of sense to require that though, Exposure could test the light and publish a burn time chart saving a bit of hassle. 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. Finance is subject to application, financial circumstances and borrowing history. Performance Cycling Limited FRN: 720557 trading as Tredz are authorised and regulated by the Financial Conduct Authority. We are a credit broker not a lender – credit is subject to status and affordability and is provided by Mitsubishi HC Capital UK PLC. Terms & Conditions Apply.