I have bought a couple of these and find with an easy mod they have a very good output and a good throw
http://www.banggood.com/Ultrafire-CREE-XML-T6-1800LM-5-mode-Zoomable-LED-Flashlight-p-75196.html
The driver in both of mine is a F13 driver like these
The driver has a second ouput (but not marked in this) which has a good output, the main down side is a hollow pill, trying to get a mate to make me a middle for the pill
I just moved output over and swapped in a XP-L on noctigon (21mm) and it easily has more output and a smaller hotspot square than the Zuesray I would say at least 25-30% more lumens.
It also takes a 26650 battery and only costs £5.22