Adrien (ex-nico239) wrote:
The total closure of the sides will be part of a new test
It is the height that is decisive. For a given width.
You have to think in a "solid angle": you put yourself in the place of a radish, and you look at the part of the sky that you see.
- at the extreme, your frame is 0 cm high: you have 100% of the space
- you take 1 m high in a frame of 1 m side and you only have 50% of the "volume above you" ...
So the "solid" well designed frames are about twenty cm maximum on the bottom side, about thirty on the highest side, and 1,2 m to 1,4 m wide ... It is high enough, on the side the lowest, for plants or low vegetables (salads, etc ...) ... Climbing more is to risk etiolation (the "spaghetti" effect due to a lack of light).
there, the radish always receives 80 or 90% of the light (it "sees" 80 or 90% of the celestial sphere above it) ... The more you go up and the more you reduce the widths / lengths, and the more that decrease ... A radish that you put at the bottom of a 20 cm diameter tube and 1 m high will only have a few percent of the light ...