Deciding between rooms

Name this room. Then hold two of them up to the winter.

Save the room above under a name, then model the next one. The figure holds them side by side: hours of sun today and at both solstices, when it first and last reaches the floor, and how far in. Send it and the other person sees the same rooms. Got it

Calculated direct sunlight, and only that: the sun's own position through a rectangular room with a level floor, a vertical window, and one uniform angle for whatever stands across the street. Each room is drawn in its own city's local time. It does not know your actual neighbours, trees or glass; it is not a measure of brightness or warmth; and it cannot tell you whether a plant will do well there. Methods & sources