Lightman strobe lights have large lenses, use 2 AA. They have Xenon and LED. The Xenon strobe lights are said to be very bright but batteries may run out fast.
Yep. My yellow lens strobe is a lightman. It's attached to my seat post saddle bag. Very bright. Batteries last about 6-8 hours of use before the blinker slows down too much to be effective.