There are plenty of fancy action cams available on the market. Not all of them perform well in low light conditions though. The SiOnyx Aurora is a day/night camera that lets you capture all the action in challenging conditions. It comes with GPS, accelerometer, and compass, so you will have an easier time finding your way around. It also has a OLED display, IP67 waterproofing, WiFi, and iOS/Android apps.
The device weighs under 8 ounces and fits in one hand easily. It lets you record 4 hours of video to a 32 GB Micro SD card.