The above picture doesn’t tell the full story. Here is the deal. Given the same amps and not de-domed an XP-G2 will have more lux but still less lumens. But here is the rest, you can drive an XM-L2 U2 way harder than you can the XP-G2 and when you de-dome it you make the lumes per square inch go up. Throw is a combination of intensity of the emitter and size of the reflector. Now when you overdrive an de-domed XM-L2 you can get close to the same intensity but with even more lumens. So you might be able to get an XP-G2 to technically outthrow the best overdriven de-domed XM-L2 it won’t be by much and you will be putting a fraction of the light on target.
It’s the difference between seeing that your light is touching the target and actually being able to see the target. I stopped building XP-G2 throwers for that reason. It’s fun to be able to say that you put X amount of light so far, but so what if it doesn’t illuminate it enough to be able to see the target?
In the three above pictures it’s my suspicion that the XML-U3 is actually underdriven and not de-domed. The XP-E and the XP-G2 are probably maxed out and the XP-G2 looks de-domed from the tint. Dedome that XML-U3 and overdrive it and then see which one puts more light on the target.
I just built an aspheric thrower recently with an XM-L2 running at 6.5 amps and the throw is simply amazing but guess what? You still don’t seem to see the target as well as with a regular lens, I don’t really know why but it’s true.
I would personally stay away from super throwers with the XP-G2. Although I like the XP-G2 in smaller throwers a lot. When you get into XP-G2’s with a really large reflector you end up with a pinpoint light and it’s not enough to really light up the whole target. I might have to build a triple XP-G2 sometime with three emitters it might make a difference.
Just my two cents but I do think you will be happier with an XM-L2 de-domed thrower, it just puts way more total light on the target. The K40vn is supposed to be an excellent light. I don’t know how much he is asking though.