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+# useSunlight
+
+A React hook for the current level of sunlight on an integer scale from `[0,10]`. Solar altitudes in the range `[0, PI]` are mapped to their height above the horizon on the unit circle (scaled up by 10), and all range below the horizon (`[PI, 2PI]`) are mapped to zero.
+
+## Usage
+
+```javascript
+// src/demo-component.js
+export const DemoComponent = ({ children }) => {
+  const [sunlight] = useSunlight()
+  const theme = sunlightToTheme(sunlight)
+  const style = sunlightToStyle(theme)
+  return <div style={style}>{children}</div>
+}
+```