DIY: Super Bright Flashlight Above 10k Lumens Costs Under $40
In this post I'm going to show you how to build a 10k lumens bright LED flashlight.
It's designed to be operated with just one hand, with easy control of brightness, and can be powered by either batteries or an ac adapter.
It has two modes, flood light mode and spot light mode, which makes it very useful for a variety of different situations.