Night Vision (XC1)

Night Vision is a gem effect in Xenoblade Chronicles. It raises the accuracy of physical attacks, but only at night. It is presumed that "evening" (17:00-19:00) does not count as "night" (19:00-05:00) for this effect.

Overview
Strictly speaking, Night Vision is inferior to, as the former only raises accuracy at night, while the latter raises accuracy and evasion at all times. However, once the cap is reached on Agility Up, Night Vision can be used to improve accuracy even further. Accuracy is also not affected by effects such as the Agility Down debuff, which can lend it more power depending on the situation.