The Moon Sirus Pro Rear Light is constructed from a CNC Aluminium heat sink casing and come equipped with break & light sensitive technology In 1996, Moon formed and launched there first bike light in the market. The dedication on design, quality and innovation has been continuously driving us to succeed in the market with a diversified product portfolio throughout the years. Moon belief that to bring the utmost standard of illumination of bicycle light for cyclists who explore mountains or cities in the dark. Inspiration is always leading us as a team of passionate cyclists, designers and engineers to pursue innovative technology and development. Moon continue our exploration for innovation and meticulously build our lights with attention to detail in every design. Every piece of our lights goes through rigorous reviews and tests in order to ensure all of your ways are lit up by our lights. Bike Lights Buying Guide