The 3M HL200 is a versatile headlamp that allows hands free lighting for industrial workers that need spot and flood light options. 150 lumen light for use with 3M Hard Hats. Weighing only 83 grams but able to run up to 150 hrs on low flood setting and 28 hrs on its high spot setting, this water resistant (IPX-4 rated)Hard Hat mounted head lamp is popular for indoor/outdoor industrial lighting applications. Comes with 3 AAA batteries and three attachment options. The rubber headband provides a secure attachment for the headlamp to most 3M Hard Hats. The 3M(TM) Dual Lock fastener works well for securing the headlamp to many hard Hat designs and materials. Providing a strapless attachment option allows the headlamp to be secured without it interfering with earmuffs and other Hard Hat attachments. Securing the headlamp without at strap reduces interference with earmuffs and other hard Hat attachments. The nylon headband allows the lamp to be worn by the user without wearing a hard hat. It is not intrinsically safe.