The light isn’t bad I am adding more water lettuce as we speak. The glare is bad but there is a but tonne in there nowThe structure looks better to me for sure. It's hard to tell how bright it is because I don't know the photo exposure, but I'm seeing algae growing on the substrate, which indicates an imbalance. You could reduce the light to address that, I keep mine really low.
That said, large rosettes of water lettuce like you have need a lot of light, so I'm not sure how well it will do in a low energy setup. Others on this forum have kept large water lettuce with success, but not me. There was a picture (I can't find now) where the tank was open at the top with a bright light from above, but a dense enough mat of water lettuce to shade the water below.