I had a pair of Soma Road Flair bar end lights that worked ok, they were relatively bright, they used the convenient AAA bats instead of button bats and I used rechargeable ones. Modern rear lights have improved so dramatically in just over the last few years that they make those Road Flairs look dim, so I no longer use them. If Soma upgraded the LED's to Cree's then they would be back on track, but until some company does that I wouldn't spend the money.

Not sure how bar end lights would have gotten in the way of normal riding, I never had any issues with normal or abnormal riding; obviously they won't work with flat bars.