Hisgadget Inc via Amazon offers the OxyLED Ultra Bright LED Headlamp
, model no. MH20, for $15.99. Coupon code "6OFFHDLP" cuts the price to $9.99
. Plus, Prime members qualify for free shipping
. (Non-members can spend $35 to qualify for free shipping; otherwise, it adds $5.10.) That's $40 off list and the lowest total price we could find. It features a motion-sensing switch, six adjustable angles, and illumination out to 328 feet. It requires three AAA batteries, not included.