Measuring the same positions at substrate and at canopy height as stems fill in.
How much does measured light change between substrate and canopy as the scape grows in?
The standing survey was taken with stems short. As they grow, the leaves that matter rise several inches toward the light, so the figure that describes a plant's conditions changes without the fixture changing at all.
Positions currently reading below their working range at substrate level will move into range as the plants gain height, without any change to the light.
Recorded before measuring, so it can be shown to have been wrong.
Not run yet. The method is set out under Measurements below.
No observations yet. This experiment has not produced data.
Results describe this specific aquarium under the conditions recorded above. They are observations, not universal recommendations.