Floodlit means lit brightly all over by powerful lamps. A floodlit pitch, the floodlit castle, play under floodlit skies.
The point is even coverage rather than brightness in one place, which is what separates it from a spotlight. Floodlighting a building at night is now argued about for its energy use and for the harm bright light does to insects and birds.
1adjectivefloodlitLit brightly all over by powerful lamps.
“The castle is floodlit at night, so you can see it from miles away.”
floodlit is a quality of lighting.