I found this at a store on aliexpress i have bought from him many lights
well i just wanted to know how you feel about it
Three XM-L2 LEDs cannot put out 6000 Lumens first of all so these are Chilumens 
. Actual output unknown. Also confusing listing as the light CANNOT be run strictly via USB power which tops out at 10.5 watts currently best case for USB 3.0 so far as I know. It uses a battery pack. Note that it lists power as two 18650 batteries. Normal protected 18650 batteries could not support 6000 lumens due to current limits and the text recommends protected batteries in the Notes area at the bottom of the listing. In fact a single 18650 is pretty well discharged in an hour MAXIMUM by a 1000 Lumens flashlight run at maximum. I also note no run times are listed. Actual expected output is going to be somewhere in the 1000 to 2000 Lumens range maximum is my guess.
See this thread. Not sure of the difference between the RJ-3000 & RJ-5000 models though (perhaps it's USB output).
-Garry