In trying to help you along right now. IF you want help. I would remove everything start over because you have a grow room or at the min a great grow space. That need to be blocked off from the rest of the house. and you want it concealed from prying eyes and noses....smile. It cool.
First think ventilation. how are you going to move the air in and out of the space. At least how to move the air out.
Second think how am i getting electricity to the space. Your a electrician that should be easy.
third how am i getting in and out of this space and keep it concealed while I am working.
fourth, which way to hang my lamps for optimum lighting
fifth or second how will i get water to this space without carrying buckets through the house.
sixth how many plants do i want to grow at one time
What I am trying to say is plan it and you will see it. You have the vision and path of what you want. Its just going to take some more planning and time on your part,
Hell good first effort. now make this one count
I just re-did my grow space. realized I was not getting max lighting and reflection. Been growing in that set up for years. after re-doing the lights I think I have more space for plants. Same amount of lights, same amount of space. but just repositioned lights to run 90 degrees to walls. Now I am able to fit ten nice size plants under two lamps. catching better light reflection and getting better lighting from the other lamps.
In other words some simple changes makes a world of difference