diff --git a/torus.py b/torus.py
index 51bd63e..e951da2 100644
--- a/torus.py
+++ b/torus.py
@@ -120,6 +120,12 @@ class Image():
 
         plt.savefig(path, dpi=dpi)
 
+    def run(self, path=None, **kwargs):
+        if path:
+            self.save(path, **kwargs)
+        else:
+            plt.show()
+
     def update_illumination(self):
         # TODO: refactor TorusWorld.illumination() do use vectoization!!
         phi = np.linspace(-np.pi, np.pi, self.res)
@@ -316,6 +322,44 @@ class Image():
         self.fig.canvas.draw_idle()
 
 
+class SummedImage(Image):
+
+    def update_illumination(self):
+        # TODO: refactor TorusWorld.illumination() do use vectoization!!
+        phi = np.linspace(-np.pi, np.pi, self.res)
+        theta = np.linspace(-np.pi, np.pi, self.res)
+        day_cycle = np.linspace(-np.pi, np.pi, 24)
+        self.torus.put_sun(day_cycle[0], 0)
+        illumination = np.array([[self.torus.illumination(ph, th) for th in theta] for ph in phi])
+        for sun_pos in day_cycle[1:]:
+            self.torus.put_sun(sun_pos, 0)
+            illumination += np.array([[self.torus.illumination(ph, th) for th in theta] for ph in phi])
+        self.illumination = illumination / np.amax(illumination)
+
+    def init_map_view(self):
+        self.lines['map_border'], = self.ax.plot(*self._mantle_map(), 'k')
+        # self.lines['pos_map'], = self.ax.plot(*self._sunpos_map(), marker='o', color='r', markersize=10,)
+        self.lines['dawnline_map'] = [
+            self.ax.contourf(*self._contour_map(), self.levels, **self.contour_kwargs),
+            ]
+
+    def init_top_view(self):
+        self.lines['circles_top'], = self.ax.plot(*self._top_section(), 'k')
+        self.lines['path_top'], = self.ax.plot(*self._sunpath_top(), 'c:')
+        # self.lines['pos_top'], = self.ax.plot(*self._sunpos_top(), **self.sun_kwargs)
+        self.lines['dawnline_top'] = [
+            self.ax.contourf(*self._contour_top(), self.levels, **self.contour_kwargs),
+            ]
+
+    def init_side_view(self):
+        self.lines['circles_side'], = self.ax.plot(*self._crossection(), 'k')
+        self.lines['path_side'], = self.ax.plot(*self._sunpath_side(), 'c:')
+        # self.lines['pos_side'], = self.ax.plot(*self._sunpos_side(), **self.sun_kwargs)
+        self.lines['dawnline_side'] = [
+            self.ax.contourf(*self._contour_side(), self.levels, **self.contour_kwargs),
+            ]
+
+
 class InteractiveImage(Image):
 
     def __init__(self, rfrac_init=0.5, sun_init=np.pi/2):
@@ -392,24 +436,16 @@ if __name__ == '__main__':
     def parse_args():
 
         def create_static(args):
-            img = Image(args.r_minor, args.sun)
-
-            if args.output:
-                img.save(args.output)
-            else:
-                plt.show()
+            Image(args.r_minor, args.sun).run(args.output)
 
         def create_interactive(args):
-            InteractiveImage(args.r_minor, args.sun)
-            plt.show()
+            InteractiveImage(args.r_minor, args.sun).run()
 
         def create_animation(args):
-            img = AnimatedImage(args.r_minor, args.sun, args.runtime, args.fps)
+            AnimatedImage(args.r_minor, args.sun, args.runtime, args.fps).run()
 
-            if args.output:
-                img.save(args.output)
-            else:
-                plt.show()
+        def create_summed(args):
+            SummedImage(args.r_minor).run()
 
         class Range(object):
             def __init__(self, start, end):
@@ -433,6 +469,7 @@ if __name__ == '__main__':
         p_static = sp.add_parser('static', aliases=['s'], help='create a static image')
         p_interactive = sp.add_parser('interactive', aliases=['i'], help='create an interactive image')
         p_animated = sp.add_parser('animated', aliases=['a'], help='create a animated image')
+        p_summed = sp.add_parser('daylight', aliases=['d'], help='sum up a day\'s light average')
 
         p_static.add_argument('r_minor', help='Ratio of minor radius to major radius',
                               nargs='?', type=float, choices=Range(0., 1.), metavar='RMIN', default=0.5)
@@ -458,6 +495,14 @@ if __name__ == '__main__':
         p_animated.add_argument('--runtime', '-r', help='runtime of animation', metavar='SEC', type=int, default=5)
         p_animated.set_defaults(func=create_animation)
 
+        p_summed.add_argument('r_minor', help='Ratio of minor radius to major radius',
+                              nargs='?', type=float, choices=Range(0., 1.), metavar='RMIN', default=0.5)
+        p_summed.add_argument('--output', '-o', help='output to a file instead of displaying directly',
+                              metavar='FILE')
+        p_summed.add_argument('--hours', '-H', action='store_true',
+                              help='sum up hours of daylight instead of intensity')
+        p_summed.set_defaults(func=create_summed)
+
         return (p.parse_args())
 
     args = parse_args()