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"Bicycle Times", January 1, 2013

EXPOSURE LIGHTS SIRIUS MK1

BY STEPHEN HAYNES

PHOTO BY JUSTIN STEINER

PRICE: $190 MADE IN THE UNITED KINGDOM WWW.EXPOSURELIGHTS.COM

LUMENS: 360 STEADY MODES: HIGH, MEDIUM, LOW FLASH MODES: “HYPER”

RUNTIME (STEADY): 2 - 6 HOURS WEIGHT (WITH MOUNT): 94G

MOUNTS INCLUDED/AVAILABLE: HANDLEBAR INCLUDED, HELMET MOUNT AVAILABLE ($30)

CHARGER TYPE: PROPRIETARY USB CABLE CHARGE TIME: 4 HOURS

The Sirius Mk1 is a straightforward light that features a CNC-machined aluminum body that is both weatherproof and stylishly sleek. The single Cree LED is no joke — the highly concentrated beam produces a circular hotspot with three lesser halos, sufficient during my pre-dawn country road rides. A great feature to the Sirius is the Hyper Flash mode, essentially a constant low beam with a high beam pulse. This gives drivers around you a heads up and allows you to see the road without the strobe-light-convulsive feel.

A single, illuminated on/off push button cycles through the light’s three constant settings and Hyper Flash mode. Each setting has a corresponding color — green for high, amber for medium and red for low. These colors double as the light’s charge indicator.

A simple rubber strap holds the cradle-like mount in place; it worked flawlessly on various handlebar widths. One drawback to the light mount was a lack of lateral adjustment. A swivel on the mount would be a great idea.

The Sirius Mk1’s small, slender profile, ease of use and hearty construction make this light a winner in my book.

WHO WOULD THIS LIGHT BE GOOD FOR?

While this is far from the brightest light in the test, it is the lightest and smallest, making it a good bet for minimalists. The focused beam makes the most of its 360 lumens. Mounting the Sirius to your helmet may be the best use given the narrow beam pattern.

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