Jewelers use VisorLIGHT. A unique lightweight battery powered light, that illuminates magnified viewing area. It easily clips onto the visor of most headband binocular magnifiers. The light adjusts up or down to ensure that maximum light is on the work area. Two models are available to allow complete mounting: LT-42 with a 42" long cord so the battery pack can be worn on a belt or placed in a pocket and LT-06 with a 10" cord for mounting on a headband. Jewelers use these excellent quality lenses mounted on a sturdy, durable material. Fits over eye glasses. Headband pivot assembly can be adjusted so the visor will stay in place when positioned. These are high quality, grounded prismatic lenses.