SE 6-way flasher
$9
Cree U2 Generic Light
$22
Dozens of vendors sell rebranded versions of this light on eBay, Amazon, and elsewhere. The lighthead is nearly identical on all variations, consisting of two Cree XM-L2 U2 LEDs and a single mode selection/power button. The battery pack varies significantly from supplier to supplier and even within products from a single vendor. Other names for this light include "SolarStorm X2" and "SecurityIng". Vendors claim anywhere from 2000 to 5000 lumens output, though actual output is about 1000 lumens on the highest setting.
Cree T6 Generic Light
$20
Cree Q5 Generic Light
$7