Pictures?

I would like to see it too. It sounds very cool! What is growing in there?

I also want to check photos! By the way as an indoor gardening enthusiast, I have not only seen indoor garden beds, but I have also used them in my own setup. They are a great way to add some greenery to your living space while also creating a focal point. When it comes to lighting, here's light bar LED from, which are an excellent option for providing optimal growing conditions. They are energy-efficient, provide a full spectrum of light, and can be easily adjusted for different stages of plant growth.

Sounds like you are doing a variant of an ebb and flow system. But without the pumping that makes it hydro? What are you planning on growing in this? Depending on what you are growing, it might be wiser to do medium+plant in pot and seat it into your gravel bed rather than doing the weed mat and medium on top of the bed. At some point the bed will want refreshing or plants need removal or adding.