The Halo Light from Illumagear is a personal illumination device that attaches to any hard hat, illuminating the wearer 360 degrees and enabling him or her to see the task area and be seen by others on all sides, especially in low-light conditions. The light is visible from up to ¼ mile away, the company says.
It is not dependent on a secondary source of light reflecting at the proper angle. It comes standard with four light modes: high alert, normal, task, and dim. A rechargeable battery lasts a minimum of 12 hours on full power. The Halo light unit weighs 9 ounces.