REI Garage offers the Serfas Bike Headlight for $15.73. Coupon code "GARAGE25" cuts it to $11.79. Opt for in-store pickup to dodge the $5.99 shipping fee. That's $4 under our mention from three weeks ago and the lowest price we could find by $23. It features a handlebar mounting bracket, side lighting, and up to a 23-hour burn time. Deal ends December 3.