Which illumination pattern would you use when an area requires more illumination than can be furnished by one gun illumination?

The pattern you would select when an area requires more illumination than can be provided by one gun is the two gun illumination option. This method employs two artillery pieces firing in a coordinated way to create a more extensive and brighter area of illumination compared to what a single gun could achieve.

Using two guns allows for a broader coverage area and enhances the intensity of light, making it ideal for situations where greater visibility is crucial for operations. This is particularly important in tactical scenarios where effective illumination can significantly impact the safety and success of missions conducted in low-light conditions.

Other options, while they may hint at multiple guns or varied patterns, do not clearly articulate the necessity for two guns working together to enhance illumination. Therefore, the choice of using two guns specifically addresses the requirement to increase illumination capability beyond what a single gun can deliver.