Yes, lumen output is my main goal. So de-doming will not increase output. Thanks, I’ll leave my LEDs domed. 
Dedoming increases throw. Lux I think is the unit of light per solid angle. It slightly decreases lumens, total light output in all directions.
That’s admittedly a bit puzzling, as the throw of the lumens being generated is dictated by the angle of the reflector, not the emitter. If you aren’t actually generating more lumens by de-doming, and also since you aren’t changing the reflector by removing the dome, you must be changing the angle of the generated light before it hits the reflector. Making it deeper in the well of the reflector, per se, less “floody”, and more concentrated into one area… which would, in turn, increase the effective throw by reducing the width of the beam — which makes sense, given that you say you effectively reduce the light output in other directions than the throw.
As Dr. Jones explains, the dome helps light escape at the surface of the phosphor. Without it, that light is reflected back and some of it scatters out. That makes the surface brighter. Dedoming makes the LED surface brighter but makes it look smaller from the outside so the total light is less.
Well then, I’ll keep the domes on, for maximum light output.
Thanks, Fritz!
I have 3 Zeusray’s, one de-domed, all used and abused and all still working.
Review of the Zeusray EDC120:
Thanks for a nice review.
I decided to get one Zeusray EDC100 after trying few other zoomies.
I’m very happy with the light, its very bright and good made for the price. In fact, I ordered 2 more, that’s how much I like it Also, I would like to add that mine has last mode memory It memorizes last mode if you leave it on for a 2 seconds or even less. That’s perfect, exactly what I need. I just hope Dealmetic will send me same lights in my new order.