What does a Uninterruptible Power Supply (UPS) primarily support?

A Uninterruptible Power Supply (UPS) is designed primarily to provide backup power during outages. Its main function is to ensure that devices connected to it continue to receive power when the main electrical supply fails or fluctuates. This is critical in environments where even brief interruptions can lead to data loss, equipment damage, or system shutdowns. The UPS achieves this through its internal battery, which kicks in to supply power instantaneously when there is a disruption.

The other options focus on different aspects of power systems. High voltage transmission is related to the distribution of electricity over long distances and does not involve the immediate backup capabilities of a UPS. Power management in homes pertains to the efficient use and distribution of electricity within a residential setting, but it does not specifically address the quick response to power interruptions, which is the primary role of a UPS. Lighting systems may require reliable power but are not the specific focus of what a UPS supports; instead, the UPS provides backup power to various critical systems, including computers and servers, rather than just lighting.