Sorry for turbo posting but I'm just responding to posts as I read them.
The idea behind light movers is not only to provide an even canopy, but to change the angle of incidence of the main light to allow better penetration through the gaps in the canopy.
This is exactly what happens in nature! The sun is almost never directly overhead – it traces an arc over the horizon and lights different parts of the plant as it moves.
OK, let's try this:
A coconut palm is on the equator. It is noon and the sun is directly overhead. The shadow on the ground is the same shape as the canopy. Only the top canopy is lit – the trunk of the palm tree is in the shade.
Five hours later the sun is on the horizon. The shadow has changed: you can now see an outline of the whole palm tree – canopy, trunk, coconuts and all! The sun is now lighting parts of the plant that were not lit when it was directly overhead.
So where did humans get the idea that you have to hang a light directly over the top of a plant?
Even when I grew with HPS, I never hung bulbs over the tops of my plants:
One of the same plants at harvest – note how thick it is all the way through.
Here's an even better example of side lighting: