Micro Stream® LED Pen Light. Streamlight Micro Stream pocket flashlight is now brighter than ever before, rated at 45 lumens. The Micro stream is conveniently portable, measuring only 3.5 long. Utilizing state-of-the-art C4 LED technology, the Micro Stream is compact and lightweight with optimized output and run time. Streamlight Micro Stream has a unique two-way pocket clip that can be attached to a pocket or to a cap for hands-free lighting.