Maybe the Petzl e+light will last longer than I thought! It just looks so fragile! I still like having the bigger Princeton Tec light for longer hours of darkness.

My Princeton Tec headlamp is old enough that I don't remember what it is. It does have the single larger LED bulb, so maybe it's an EOS. The "Aurora" name sounds familar, but I may be wrong. I didn't keep the receipt from Campmor or the Princeton Tec paperwork, so I have no way of knowing. It was a closeout item back in 1996. All I know is, I really like it, even though it's on the heavy side. I suspect it does have a regulator because the light doesn't dim until the batteries are ready to die altogether.