Which of the following is NOT an example of concealment?

The correct choice is bright lights as the scenario described does not serve as an example of concealment. Concealment refers to methods or conditions that obscure visibility or protect from detection. In contrast, bright lights enhance visibility rather than diminish it, making it easier to see details in the surrounding area. This is fundamental in both boarding operations and tactical scenarios where concealment is crucial for safety and operational effectiveness.

In contrast, darkness, fog, and smoke all provide a cover that can hinder visibility and obscure detection. These elements create conditions that enable an individual or object to remain hidden from view, making them effective methods of concealment in various operational contexts. Thus, while the other choices contribute to obfuscating visibility, bright lights illuminate rather than conceal.