What feature can enhance the visibility of a helmet during low-light conditions?

The feature that can enhance the visibility of a helmet during low-light conditions is the use of reflective material or bright colors. Reflective materials are designed to bounce light back towards its source, making the helmet more visible to others, especially in situations where light may be limited, such as at dusk, dawn, or in inclement weather. Bright colors also contribute significantly to visibility, as they stand out against darker backgrounds and can catch the attention of others more effectively.

In contrast, elements such as dark color schemes can decrease visibility, blending into surrounding environments. Built-in lights, while also effective for visibility, are not the only consideration for enhancing a helmet's visibility in low-light conditions and may depend on battery life and user preference. The size of the helmet does not inherently affect visibility, as it is more about color and reflective attributes that capture light and enhance detection by others.