Lighting in the conservatory update

This is an update to this post: https://www.reddit.com/r/DIYUK/s/HuYIdYu2Rm

Basically we've managed to install LED light strips and after some obstacles with the supplier (Ultra LEDs) it's finally working. But it seems like the lights are just not bright enough (pics may not reflect this issue.. but trust me you can't see much in there after 4pm). Has anyone got this issue? I am not satisfied with the whole thing and I don't know how to fix it.