What must be done when the flag is flown at night?

When the flag is flown at night, it must be illuminated. This requirement is established to ensure that the flag is displayed properly and respectfully, even in low light conditions. Illuminating the flag maintains the integrity of its display and honors the symbolism it represents. The illumination should be sufficient enough to make the flag visible to all, adhering to proper flag etiquette and U.S. Flag Code, which state that a flag should be displayed from sunrise to sunset and can be displayed at night provided that it is properly lit.

Other options do not align with standard flag protocols. For instance, taking the flag down at night would not comply with the ongoing respect that should be afforded to the flag. Folding the flag is also not relevant in this context, as it pertains to storage rather than display. Replacing it with a lighted version is unnecessary since maintaining illumination of the existing flag suffices. Thus, the appropriate action when flying the flag at night is to ensure that it is properly illuminated.