I beg to differ.

You may not always have your cell phone on you, like maybe if you dash off to the men's room. I always have my Arc flashlight AAA with me, however.

Carry a Photon II, moot? Never! But then again, I'm a Photon fan.

I wouldn't trust any light on a cell phone. Don't trust cell phone batteries. And the light from my cell's screen is not enough to light anything but the screen.