The Petzl Iko Core has a maximum output of 500 lumens, but can be used in two other, less powerful modes depending on your needs, the length of your outing and the remaining battery. The battery is rechargeable, but this lamp can also be used with batteries. This headlamp therefore offers three lighting modes, all in white light, which is suitable for outdoor activities that you practice alone and where you need excellent visibility. It is ideal for running, trail running, etc. The Airfit semi-rigid headband is very comfortable to wear, adjusts easily and allows you to use the light in different ways (on your head, around a helmet, around your neck, attached to a stake, placed on a table, etc). Features: Power: 500 lumensWeight: 79 gBeam type: wide or mixedPower supply: CORE 1250 mAh rechargeable battery (included)Charging time: 3 hoursBattery compatibility: alkaline, lithium or rechargeable Ni-MHCertification(s): CEWaterproofing: IPX4 (weatherproof)Lock functionMultiple wearing modes and attachmentsErgonomic, hydrophobic and easily adjustable Airfit headband Detailed lighting performance: White economy mode: 6 lumens over 10 meters for 100 hoursWhite standard mode: 100 lumens over 45 meters for 9 hoursWhite maximum mode: 500 lumens over 100 meters for 2 hours and 30 minutes Headlamp Petzl ---Iko Core Orange