The niterider solas 150 rear light is a great way to fend off the rear approaching vehicles and other road users the solas 150 features two bright red leds that produce 150 lumens with 4 different modes including the ever so popular group ride mode the group ride mode is ideal when you are riding with your club or just going for a ride with your mates it dulls the brightness down so that you can still be seen but without distracting your fellow cyclists the solas 150 is usb rechargeable w