With pricing varying by ZIP code, Home Depot cuts up to 63% off a selection of LED light bulbs. (Prices are as marked.) Opt for ship to store pickup to dodge the $5.99 shipping charge, or get free shipping on most orders of $45 or more. (Select items under $45 also bag free shipping.) A couple best bets:
Bang Good offers the Cree 600-Lumen 7-watt Zoomable LED Flashlight in Silver, Black, or Gold, model no. XPE-Q5, for $2.59 with free shipping. That's the lowest total price we could find by a buck, although we saw it for slightly less in April.
Expect this item to take up to three weeks to arrive.
BuyDig offers this Cree LED Flashlight and 9-LED Taillight Bike Kit 2-Pack for $33.99. Coupon code "BIKERIDE" cuts the price to $18.99. With free shipping, that's tied with our May mention and $3 below the best price we could find for similar items purchased separately elsewhere. The flashlight detaches for off-bike use and features steady or strobe modes. The taillight features seven flash modes.