I love when people look into the light and turn it on!
At work, they looked into my Batonlite and turned it on...wow! That is bright! A month later they did the same thing to my Badboy 500, they used some select words on how bright it was. Then the smaller Mini-LGI showed up a month after that...same thing, as the Mini-LGI is brighter, they saw spots for a few minutes.
The latest beast is a 5 watt Cyan LS in a 5D Mag
This time, they knew from the last three times, don't look at the !!@#$%^&*!! thing! I also cut them a break and put this label on the head: "Warning! Intense 5 watt Cyan LED Avoid looking directly at emitter" It is blinding, with the new 30mm optics (makes a 4X brighter narrow beam) this thing is basically a weapon.
I am waiting for a 2W Nichia equipped Arc myself, it sounds like the limit for the form factor Arc uses.