Exposure’s Sirius Mk8 DayBright is a 750-lumen front light that offers ultra-bright output and excellent side lighting. The compact and lightweight light comes with a rugged casing unit that offers protection against impacts and hostile weather conditions whilst intelligent thermal management that stops the light overheating and improves performance over long term use. For further convenience the light is micro-USB rechargeable and comes with a versatile mounting strap. The lights can be easily switched between and includes a DayBright flashing mode which keeps you seen during your daytime rides. Specifications Light source: 1 x white XPL2, 1 x red XPE-R LED Maximum lumens: 850 front, 75 rear (up to 120 in ReAKT mode) Modes: 7 front, with additional high, low and medium options within some modes, 3 rear, each with constant and pulse option Run time: Front – minimum 3 hours, maximum 24 hours pulse, rear – minimum 2 hours, maximum 36 hours Battery: Front – 700 mAh Lithium Ion, Rear – 2,900 mAh Lithium Ion, USB rechargeable Recharge time: Front – 4 hours, rear – 5 hours Dimensions: Front – 57mm x 28mm, rear – 110mm x 28mm, Manufacturer’s claimed weight: Front – 35 grams, rear – 84 grams In The Box: Sirius MK9 DayBright TraceR Mk2 ReAKT Handlebar Bracket Seatpost Bracket USB Charge Cable QS Guide Technologies: DayBright – 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. Optimised Mode Selector (OMS) – 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. Fuel Gauge – Using a traffic light system remaining runtime is easily monitored at a glance so you’re not caught out. The colour feedback is also used for mode selection, before defaulting back to runtime. Intelligent Thermal Management (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.