I've been using a Serfas headligth for years. Something sorta like the True Series on their website now but only 300 (?) lumens. Cost ~$150. I use in both flashing and steady modes depending on where I am and the battery life I need. Bought it around 2008 and have done nothing but charge it.

I do find as a driver that I cannot always judge the speed and distance of strobes. I've also heard about seizures. I find some strobes are impossible for me to see with when it is very dark but others work. That old Serfas has a strobe I can see pretty well with.

Anytime I have very bright or obnoxious lights, I try to be aware where they are pointing. (I curse the folks that ride with bright helmet lights and look at me when I am riding the opposite direction. I find myself blinded for a few seconds.)

Ben