Nice. I didn't see those at Home Depot...but I did pick up a T30 Torx so I figure I'll do it right and see what the bracket looks like inside the cladding. I will go look for those tools though as this is not the only stubborn screw/bolt I have dealt with in the past.

I guess I should take some photos in case I end up doing anything major so everyone can see how not to do it.

Edit to add: there's very very little of the screw head that is sticking up above the surface of the lens...I'm not sure how much those power grips need to work. I couldn't get needlenose vice grips to grab them, let alone turn them. So I think the power grip tools will be a cost based decision, but thanks for the link.