George Scott of Road Cycling UK writes a very detailed analysis of the Gemini Duo concluding:
"Light technology has come a long way in a short time and the Gemini Duo is a case in point. It's undoubtedly a premium option but is very competitively priced considering the lumen output and battery life - both of which are superb.
In truth, it's likely to be too powerful for those who only ride on the road, and Gemini's 950-lumen Xera (£129.99/£149.99) is an alternative worth exploring, but otherwise the Duo is an incredibly bright, versatile light for riders who want to turn night into day."
Read the full article on RoadCyclingUK.com