The Petzl MYO RXP Headlamp is a sun. This light is perfect for any situation where darkness exists and will be your go to light for all activities, physical or not. Ran by 3 AAA batteries, this light can boost burn up to 370 lumens and even has a strobe light that is programmable. Speaking of programmable, withe the use of OS by Petzl, you can pick and choose all of your outputs and profiles to custom fit your needs and extending the battery life to your lifestyle. Keep your hands free and run longer and earlier thanks to Petzl.