In therms of throw, U2(1885 Lux), L5(1370 Lux) and lastly L4(512 Lux)(all according to Flashlight reviews). I've heard the L4 will get too hot to handle in about 15 minutes after turn on, not sure about the U2 or L5. The 100 lumen rating should be correct since surefire underrates their light output.
You might also want to look at the
NovaTac EDC line of lights. 120 true lumens. The throw of the previous Luxeon light is between the U2 and L5 at 1400Lux, the new one with a Seoul LED(double the efficiency of a Luxeon) will throw further than that. I'm not sure they'll arrive on time though.
You could also buy the Surefire G2Z, G2(I would not recommend these two if you are using a LED drop-in, plastic keeps in the heat and heat is bad for LEDs), Z2, C2, 6P
Malkoffdevices Drop-in(
thread). It will out throw the U2, L4 and L5 but there is only one mode and I'm not sure about reliability, but it should be pretty good. Maybe you could buy two lights, one bright one dim and increase overall reliability.
Remember that white LEDs don't produce much red and a red filter will cut lots of output. It might be a better idea to buy a dedicated Red light if you need this capability.
What will you need the light for? How tough? Gun mountable? Froward Clickie or Tail twistie with momentary? How bright?
Good luck in Iraq,