Do people ever just flipping LOOK? One trip to "where something ought to be/used to be" - not finding it right there and the result is: "Where is it? I know we have it!"
As if I came in the night like the fairies and moved things around - just to play with their minds...
Box of light bulbs found. In plain sight. In the middle of a table. In a lighted room. With LABELS on the box identifying what it was.
Just plain laziness.