OrbitSun&trade; Light for Hardhats &mdash; 400 Lumen Forward Output and 360&deg; Safety Beam High beam shines 100 feet ahead 360&deg; safety beam is visible 600 feet away Battery pack's 'Power Protection' circuitry prevents failures during charging Product's weight is undetectable with only 1.4 oz added to your hardhat 3M VHB (Very High Bond) tape holds LED bands securely against your hardhat