Please Help. Overwhelmed by data for budget 30yd airgun light.

Are you comfortable with using a li-ion battery? They also require a separate charger, so that also comes into consideration.

I personally would recommend the XinTD V4, reviewed by Foy here: Review: XinTD C8 SC-82/V4 (3C neutral white)

It has a good balance of spill and throw, and the neutral white tint is pretty good for outdoors.

If you want a powerful thrower, check out the Jacob A60 or the HD2010. The HD2010 might be a tad big for every day carry.

For AA usage, I would also recommend the XinTD X3, featured here: Introducing XinTD X3 XM-L2 3*AA Flashlight