Maybe just better bulbs ...
Those lights don't seem to have enough shine
I think you need more light. Those little lights lose all their intensity once you're more than a few inches away. Going to have problems penetrating depper down.
I was looking at LED lights made for growing Pot at first because the lights were so expensive only Pot growers could afford them.
I saw a video of one grower who had weeds growing under the plant, the lights were 3 feet above the plant tops & the plants were 4 foot tall.