Now available in a TI Version as well, i have it in black. Love it and yes the output is lower as advertised but many lights are like that. A nice exception was the sunwayman C13R, it has exactly the advertised lumens or the armytek prime C1 pro, this one was somehow higher as advertised.
I meassure about 550 Lumen in a DIY sphere but this always depends on the battery as well. I used an olight 14500.