The Wall Street Journal had a short bit on the Betty – a 1400 lumen bike light from a German company, Lupine Lighting Systems, that retails for over $1,000. I don’t know which surprised me more: The kilobux price tag for a bike light or the 1400lm brightness.

The light uses 7 P4 LEDs from Seoul Semiconductor, which each emit 240lm at 1A. So, yeah, you’re going to need one big battery to supply this light – what does it use? According to one of the suppliers, it’s a “13.8AH bottle battery.” I read about a lot of different battery types and configurations, but I’d never come across a bottle battery before. Come to find out, that’s what you call a battery that fits in your bike’s water holder – other sites refer to it as a “water bottle battery.” And of course, it’s a lot bigger than the light itself.