How do I best display LED strips so the bulbs are hidden from sight?
Cove or crown molding that is below (free from) the ceiling by 2-4 Inches will give a subdued look.  I would place the strip on the wall just below the aperture of the molding (that slit exposed by lowering the molding).  Some installations I've seen use a separate wall trim that angles the light strip up..IE attach a wooden strip behind and below the crown, attach the LED strip to the 45 block.