It was finally light

I use it for work. Amazing what you can do with LED. 3 AAA batteries out (Micro) pure (not supplied), intermediate ring and On. I tried it once with 2 CR2 3-volt batteries. Really bright, it was not. The flashlight was too warm for my taste. The brightness with 3x AAA 4.5 volts but really sufficient. Price is unfortunately now risen by almost 90%.
15 Watt seems very ambitious. Let's stay at 3 watts. :)