The Gemini Iris 180L Rear Light provides 200 lumens and weighs just 42g (including battery), the Gemini IRIS LED Rear Light is a perfect mix between precision and performance. Tackle your commute with confidence knowing that the Gemini IRIS Rear Light has got your back. Featuring a multitude of essential light modes, you’ll never be short of options no matter the conditions. With up to 22-hours of run time from one 90-minute charge, the Gemini IRIS Rear Light is as efficient as the Tokyo subway. To help make sure you’re never caught out in the dark, the smart battery indicator will let you know when it’s running low on juice.