I don't have any of these two lights, even though I have recommended them!
I do have the P20C2 MK2 neutral white and thats a nice light. The first model of P20C2 and P20A2 had this stupid strobe but in the Mk2 it's hidden and no problem.
In the P100A2 there is no strobe at all so it's no problem there either.
I don't know how throwy the P100A2 is but I think it's more than P20C2.
I also have Fenix TK20 and LD25 and both of them are neutral white and great lights. The TK20 a little bit to throwy for allround use and bike but there the LD25 is better and very good on the bike.
The E21 has a little more throw than LD25 as I have understood and I think it would be great for you.
You can get the EagleTac in both neutral and cool white but the Fenix is only neutral.
If you want cool white then it's the P100A2, and that is also the brightest one then.
If you want neutral white you can pick either one and I don't think it is much of a difference in output (maybe the P100A2 is a little brighter on the paper).
I like the look a little better of the E21, but thats subjective.
Except the plastic grip it's rather similar to my LD25 and that feels like a sturdy flashlight
Both are probably good lights
(As you might have understood my preference is neutral white
)
Open up these two links in two windows and compare them side by side (the P100A2 is the cool white and a little bit brighter than the neutral white would be)
http://fonarik.com/test/?model=21&scene=2&mode=0http://fonarik.com/test/?model=21&scene=2&mode=0
http://fonarik.com/test/?model=21&scene=2&mode=0
This site is a very good reference for beamshots.
Thanks for your great work Fonarik! :thumbsup: