Task Force looks better (to me) when slightly diffused
I have the older Lowes 3W Task Force (with Luxeon) and found the beam to be too focused (spot-like) for usage on my bicycle handlebar. Apparently the new CREE version Task Force is even more spotlight-like.
To fix this, I made a diffuser. I tried a bunch of materials and settled on a clear frosted-plastic sheet protector. This particular item was a job ticket envelope from Office Depot. I'm sure there are a lot of similar thin, barely-diffusing plastic sheets that would work.
As you test different materials, be careful that the diffusion is even; sometimes a material diffuses more in one direction than another. Also, check that the light loss is minimal. Obviously, you want the material to "reposition" the existing light, not absorb it. With my material, I could not see a significant decrease in the light output.
For the Task Force, I cut a circle about 1/16" larger than the glass front. The plastic simply slips under the glass front (between the body and the glass) and will stay there. It looks factory-installed, yet does not even require opening the flashlight body!
This gives me beautiful diffusion. There is still a strong central area, but falloff is now very smooth. It is more pleasant to look at an area because there are no harsh lighting contours.
So, if you are considering either of the Task Force lights (Luxeon or CREE) but the "spottiness" of the light pattern is objectionable to you, try using inexpensive homemade diffusion.