We have reflected elsewhere upon the darkness in the rumpus room.
Here you see the rumpus room with the hole cut in the ceiling,
but with no extra light coming in yet;
you can see that the far end of the room, even with the new carpet,
is relatively dark, especially when the room is lit naturally.
Now you can see the light pouring in through the hole, but the
tube is not yet in place. The roof collector assembly is
castng odd light patterns.
Here the installation is finished, and Merinda is holding a book
up in the light streaming in.
The exposure of the camera has changed... note how much "darker" the
train table looks, although it is illuminated to virtually
the same extent as it was minutes before.
Here is the view into the main upstairs bathroom with neither
the skytube open to the outside nor the lights turned on.
The bathroom has always required artificial light to be
Now you see the same view, but with the skytube in place.
Finally the same view again, but with the two 100W-equivalent and
four 60W-equivalent lights turned on.
Comparing this view with the previous photo,
you can see that the skytube is providing at least as much
light as the bank of long-life globes (note from the
change in the intensity through the window that the camera
is using a slightly smaller exposure).
There is perhaps the equivalent of a few hundred watts of artificial light
Conclusion: Tube-style skylighting works quite well. (An Australian invention.)