e=mc²
Enlightened
Well, our first real cold snap is here and I figured I would try out the lithium AA'a in my flashlights that I carry in my automobile. It turns out, in the new dual torch/fluorescent from Energizer (Arc White), the fluorescent portion has a delayed start up, remaining dark for approx 20 seconds, as well as a longer "warm up" time to full brightness. The ambient temperature inside the car was -2C (28F) when I performed this test. Of course, the torch (incandescent) section illuminated immediately with no noticeable difference in brightness from room temperature operation. I guess I can assume that this is due to the nature of fluorescent and cold cathode type tube lamps. I have a compact fluorescent porch light on the house, and in the winter months, it takes a full 5 minutes to achieve full brightness.