Summary

This is a LED cove light system using 3/4" quarter round and Royal Mouldings 5165 (Lowe's Item #1125371)

Inside corner cover is only needed if you want to hide something (wire through wall in my case)

-Recommended to mask and paint the upper bit of the wall white
-First cut and install the quarter round
-Measure and cut the 5165 moulding
-Cut and connectorize the LED strips as needed
-Adhere LED strips to the 5165 moulding
-Attach 5165 moulding to the wall using white flat head thumbtacks