the first Topic i posted on Extreme Opposite lights,
was the “Most Expensive & Cheapest Lights” in your collection, now this topic is show us and tell us what is your ” largest Light and your smallest Light” 
In my collection my largest is this 75-Watt HID converted Cyclops with a 10” inch diameter reflector as seen in the photo below, and the smallest is this tiny red keychain LED light that uses 2 LR41 cells and a tiny SMD micro-LED (The little red object on the right that is not much bigger than a Contact-C tablet.
