Looks really good, always wondered how much light the underside of leaves could absorb, it's a good idea,
I have seen a few plants grown outside in the UK, Spain and they receive less light in mid/late flower Vs a led indoors, because the weather not great in October, but the light does cover all the plant, it seems like plants outside use every leaf on the plants(so they stay green) and they last, plants grown indoors under led are pushed really hard, all the light hits the top of the canopy, about 6" and the rest of the leaves just store food etc.
I find the leaves at the top of the plant tend to start burn out, 7 weeks in flower.
If I use less light say around 30,000 lux and have side light about 18" below the main light, so I can create a dome shape, based on the side light giving the plant 30,000 lux each side.
This way the plant recives the same amount of light but the leaves should last longer inturn giving me a larger crop.
I happy with my crops but always looking for ways to improve the bud quality and crop size.