Pluto is billions of miles from the Sun. The sunlight is much weaker there, but it isn’t as dark as you might suppose. There’s a time during dawn and dusk each day when the sunlight on Earth matches that of high noon on Pluto.
The New Horizon’s project guys at NASA calls this “Pluto Time”. If you go outside at this time on a clear day, the world around you will be as dim as the surface of Pluto. NASA has posted an interactive widget that provides the approximate time based on your location.
The next Pluto Time here at stately Hoge Manor is at 8:38 this evening.