The Busch and Müller LUMOTEC IQ2 Luxos was the first model to feature the IQ2 reflector which claims to give a wider and more homogenous beam compared to IQ models. In addition to the updated optics, the Luxos offered options for USB charging output and a cache battery, both new features for Busch and Müller. The Luxos is available in two quite different options. The ‘U’ model has the USB output and cache battery. The battery enables a ‘boost’ mode where brightness is boosted temporarily. The ‘B’ model, on the other hand, offers just the light.