Which of the following best describes VFR conditions?

Flight under Visual Flight Rules (VFR) conditions implies that pilots operate with visual reference to the environment outside the aircraft, particularly the horizon and landmarks on the ground. This means that visibility must meet certain standards, allowing pilots to navigate and make decisions based on what they can see, rather than relying solely on instruments.

In VFR conditions, the weather typically features clear skies and good visibility, which allows pilots to maintain an awareness of their position and surroundings during flight. This ability to see and avoid obstacles or other aircraft is crucial for ensuring safety.

The other options describe scenarios that do not align with VFR conditions. Flight under instrument conditions refers to Instrument Flight Rules (IFR), which rely heavily on cockpit instruments due to poor visibility. Flight at night without lights poses significant safety risks and is generally not permissible under VFR as sufficient visibility is essential. Similarly, flying in adverse weather contradicts the principles of VFR, as good weather conditions are a requirement for VFR operations.