As I see it, the challenge of getting the best performance with the Photon lies with trying to balance the amount of IR light required for a clear view of the target with the Photon (lens cover centerpiece punched out, cap closed) with the IR feedback you get from closer range brush, or even grass.
The T20 has two power settings, and I've found that using the low power and a tighter zoom helps limit feedback in some circumstances.
Height helps, like being in a tree stand. For use from the ground I've been wondering, and my bud was too, if an adjustable light mount, like those available from Hog Lights or other hunting light wholesales/manufacturers might not help. If you were to mount the light mount on the Photon tube and adjust the mount so that your reticle/target is toward the bottom of the cone of the IR light when zoomed tight, it should limit the feedback from tall grass and low brush between you and the target. Then primarily use the high or low power settings to control the amount of light at the target. The feedback from brush and grass below the line of sight from reticle to target is the feedback that is most detrimental. My bud, who has a lot of experience hunting with red lights, has an adjustable mount and we'll give it a try at some point. He was pretty confident that it would help a lot.
Edit: Sorry for the typo's, I'm using an iPod at the moment and the friggin auto correct is killing me.
Also, just to mention that I had been primarily using the T20 zoom feature to control IR light at the target, but I recently started using the power setting to control the amount of illumination, and zoom to control feedback. the second method, using the power setting, and using zoom to limit feedback is a lot better.
I would love to hear DoubleUp's findings, he has a lot more time behind the Photon, and sure has been putting it to good use lately. You can see his recent baiting and calling successes in the Baiting thread under predator hunting.
JPK