IKO Lightweight headlamp with multi-beam and AIRFIT headband. 350 lumens The IKO headlamp combines multiple technologies to offer 350 lumens at only 90 g. Featuring an AIRFIT headband, an ultra-thin lamp body and an energy source worn in the rear, the headlamp is balanced and comfortable enough to be imperceptible. The multiple LEDs are ideally distributed to provide uniform lighting, for optimal visual comfort. IKO comes with 3 standard batteries and is also compatible with the CORE rechargeable battery, thanks to its HYBRID CONCEPT design.