powerhouse

I'm looking for a really good, really bright rear safety light as a Chrismas gift to my aunt. Besides being a commuter cyclist, she has some long distance experience, too. When she asked for a rear blinkie or safety light to attach to the back of her bicycle, I wasn't sure which type suited her needs the best. Was she referring to one of the smaller, brighter lights like the PB Superflash? Was she asking for something larger and dorky like the Blackburn Mars 2.0, or something else? I do know that she doen't have a rack on the back, nor does she do her riding at night.

Which would you recommend? Which makes more sense? Please give me your feedback. There isn't much time left.

Thank You,

Powerhouse