The zone between 200 meters 656 feet and 1 000 meters 3 280 feet is usually referred to as the twilight zone but is officially the dysphotic zone.
Floor depth light.
Light loads for one to two light cars or trucks the concrete should be at least four inches thick.
In this zone the intensity of light rapidly dissipates as depth increases.
Also light shelves should be installed high enough to be out of hanging reach and to avoid a feeling of claustrophobia.
From south to north has been shown to be viable for daylighting.
Vinyl flooring is usually the thinnest choice for floors and 1 8 inch vinyl installed over 1 4 inch underlayment will add only 3 8 inch to the floor height.
A maximum facade facing due south is the optimal orientation.
The type of flooring you choose will add some height to the floor.
Only a small amount of light penetrates beyond this depth.
Deviation from due south should not exceed 15 in either direction for best solar access and ease of control.
Joists in home construction are usually made with 2 by 10 or 2 by 12 lumber.
A floor depth of no more than 60 ft 0 in.
Light shelves also have size limits.
The bulk of the floor s thickness comes from the joists which are the horizontal beams that carry the floor s weight.