Princeton Tec’s Scout headlamp ($22) has 2 white LEDs and three brightness settings: bright, very bright, and blinding. It’s easily the most powerful LED headlamp I’ve tested. The plastic clip on the back holds the light to a hat brim nicely, but it broke off when I tried to wedge it around a particularly fat object (my bike’s handlebars). The stretchy headstrap still works, though, if I feel like turning myself into a bionic Bjorn Borg.
