I think he rather meant using this sensor to automatically disable torch, when sensor detects high ambient light, then, re-enabling it again, when in dark (only when torch is activated by user, not as general trigger).

While I can imagine some use-cases for it, I don't think it's worth the effort, still, even if it would be purely optional. Not to mention countless of situations, where user would forget to disable it (due to it going into OFF in lhigh ambient light), and indeed, torch would come back to life in pocket :P

/Estel