The Sunshine Index

Looking for a ray of sunshine in the depths of winter? Head to Mustique, a tiny 1-mile-by-3-mile island in the sunny Caribbean. But it will cost you—$3,338.66 per hour, to be exact.

To find out where homeowners get the most solar bang for their buck, real-estate consulting firm Knight Frank looked at 14 warm-weather vacation spots around the world. Using the average hours of sunlight per day and the average house price for a four-bedroom property in a prime real-estate location, Knight Frank arrived at the price for an hour of sunshine, averaged over a year.

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