Very nice design, execution and expense to solve a problem that doesn't exist.
My LA524 has a level bracket on top of the bucket, well visible from the operator station. I never have an issue with leveling the bucket, observing the bracket and adjusting, by feel. So many tractor skills, well executed, require experience which results in feel for the machine. For instance grading a road with a back blade after having dropped spoil which contains roots and grass tops, dragging the load down the road and feathering the blade so as to leave the dirt behind while collecting the plant material so it can be collected with a level bucket at the end of the run and deposited off the road. The blade becomes an extension of the operator and no LED lights are going to beat the native relationship between the blade position and the operator's mind and hand on the control lever.
I too appreciate the quality of your modification but I chalk it up to your desire to pimp your tractor, which is just fine. I'll stick with the basics and develop my machine handling skills to achieve the desired results.
Respectfully submitted by a Machine Operator