skywave2009 via eBay offers this CREE XML-T6 1,600-Lumen 5-Mode LED Flashlight
. That's the cheapest 1,600 lumen flashlight we've ever seen. (For further comparison, it's $11 under the lowest total price we could find for any CREE XML-T6 1,600-lumen flashlight elsewhere). It requires one 18650 battery (not included.)
Expect this item to take two to three weeks to arrive.
Update: Shipping adds 99 cents.