Dengoh, I find the amount of light coming out of the switch to be almost too much. In my bedroom with no lights but the green glow of the switch in standby, my entire room is lit up and it’s almost too bright to sleep with. I do agree that a 3 lumen moon mode would be a nice addition as low mode on this light is a little too high at almost 500 lumens. Definitely an outdoor light unless you are tailstanding in an outage.
As long as you use a matched set of quality cells (I use unprotected Panasonics a whole bunch) and monitor the voltage to make sure it doesn’t get too low you should be just fine. The light will let you know when you hit 2.75v by the power light turning red and flashing but I’m not comfortable letting them get that low.
Ok, thanks for the info 
Thanks JohnnyMac for the very comprehensive review.
It is safe to discharged to this level. I have two times seeing the red LED flashing even after I switch off the light, then I took the batteries out, both times measured 3V on my batteries. I guess under load, it will be below 2.75V. When I put the depleted batteries back, it will be green LED. If she has something like EA4 that can measure batteries voltage, she will be perfect perfect. She is already perfect with this low voltage warning feature as on par with many other new flashlights with low voltage protection.
Again, no matter how good or safe 18650 flashlights are, everyone should have at least one good multimeter if want to use 18650 batteries, I have two and put them in different houses. And treat batteries with respect and don’t abuse it.
Ok, very interested, so I would definitely want the U3 or XML2 version, how would I go about ensuring that I got the latest, greatest, finalized version?
Johnny, this is the best review I've read in a long time. You rock bud!
Thank you, good sir! A very Happy New Year to you! May your bottle of champagne be treating you as well as mine is me. 
:face_with_monocle:
I just got home from a neighbors house. I'm wasted!.. Happy New Year to you my friend!
All the broken photo links are repaired. Clicking on the small images will now take you to the fuller sized versions. Sorry about that. 
Good review Johnny, good to see you back too. I may have to save up for this light, looks awesome. :bigsmile:
http://www.intl-outdoor.com/blackshadow-terminator-4xml-u2-418650-3500lm-flashlight-p-660.html
I think I’ve found my birthday present, I’ll be ordering in neutral though I think.
I would go for the U3 version, maybe? The difference between 4xT6 and 4xU3 might be visible (at least if you know it 
).
The difference would definitely be noticable - nw compared to cool white….
I wouldn’t get het up over u2 vs u3 though, same tint bin, you’ll only tell the difference on an integrating sphere.
I really need to get one of these in 2013… I wonder if blackshadow will release neutral versions as well as possible xml2 versions in a few months?
Thank you Johnny for that amazing review. This one is on my list for 2013.
Check the link above…
Thats for sure, I was more thinking about the difference in overall brightness, not between the different tints.
You have to remember that this is definitely an outdoor light and not one for regular indoor use due to the nearly 500 lumen low. Having a light made for lighting up a lot of area at a good distance you just may prefer the U3 over a neutral T6. There will be a noticeable difference in output between the two. I measured a 400 lumen increase over the U2 version with the U3. You should see at least 400 lumens less than the U2 with neutral T6 making a difference of around 800 lumens between the U3 and NW T6. Outdoors that difference should be noticeable but, granted, only if you ever saw them next to each other. As they say, ignorance is bliss but for many here, just knowing they could have had it brighter is enough to cause dissatisfaction.
ah! didnt see that thanks!