What requirements must a balloon meet during the sunset to sunrise period?

During the sunset to sunrise period, balloons are required to have specific lighting to ensure their visibility and enhance safety. The requirement for steady aviation white position lights combined with a red to white anticollision light ensures that the balloon is clearly visible to other aircraft, reducing the risk of collisions.

The steady white position lights indicate the balloon's position and orientation, while the red to white anticollision light serves to alert other aircraft to the balloon's presence. This lighting is essential in low visibility conditions, such as during nighttime, when it is crucial for the balloon to be recognizable to pilots operating nearby.

In contrast, merely having a rotating aviation light or just noise signaling devices would not satisfy the necessary visibility requirements during nighttime operations. Allowing the balloon to operate without any lighting requirements could significantly increase the risk of accidents, as other aircraft would not be able to see the balloon, which is why this option is not acceptable.