These headlamps are designed to confidently guide you through the darkest conditions you may find yourself in. Both are lightweight and incredibly well-built, so you won’t have to worry if one takes a tumble or accidentally gets knocked against something hard. Some LED lights burn bright in the beginning and slowly fade as the batteries run low. These are equipped with regulated LEDs that maintain constant brightness throughout the life of the batteries. Smart idea. Plus, a monitor lets you know when it’s time to change batteries. Three brightness levels and a 90 degree rotation focus light right where you need it. The Spot has one super-bright LED intended for more direct lighting. The Quad has four brilliant white LEDs for all-round illumination. Waterproof up to 1 meter. Spot is 25 lumens, included batteries last about 60 hrs. Quad is 21 lumens, included batteries last about 150 hrs. 2.25""×1.75""×1.25"". 3.5 oz.