At the end you will get into a room with the large red beam in the middle and find the second cell. (thetech52.com)
The Foxelli Headlamp Flashlight has a steady red beam option as well as high, medium, and low white beams. (geekwrapped.com)
Imaging atomic - scale electron - lattice interactions: A laser pulse (red beam coming from right) gives electrons in a manganese oxide a «kick» of energy while a high - energy electron beam (blue) probes the atomic structure. (sciencedaily.com)