I find these are cracking little torches unfiltered for up to 35/40yds, with my eyes anyhoo.
Put a filter on and you are drasticaly reducing the beam, like i said initially, only really any good for ratting, using a red filter.
For a light weight combination ie ratting, green rabbits etc i often use the p7 on my 3.5 x 10 x 50 WTC and i find its ok to the 35/40yd range unfiltered but it is a strain on the eye.
I also have the p6 and the PTF, good torches but i think something like 220+ lumens would be more suited.
Imo