Hodgson Sport via Amazon offers its Hodgson Cree LED Headlamp for $21.99. Coupon code "WBDMOCL4" drops the price to $7.92. Plus, Prime members receive free shipping. That's $36 off list and the lowest price we could find. This waterproof headlamp features an SOS whistle, firestarter, up to 240-lumen output, and includes a rechargeable battery (but can also function on three AAA batteries).