Step 1: Gather Materials
a piece of cardboard in decent condition
a photograph or decorative paper
T-square, triangle or something to help you draw a straight line
straight edge for cutting
a level (optional)
Step 2: Identify Offending Fixture
Step 4: Measure Twice, Cut Once
To get the overall width that the piece will need to be do this equation:
(sconce width + 2") + (2 x sconce depth + 4")
The height of the cardboard piece should be at least as tall as the light fixture.
If you are using a cardboard box cut along the edges to get a long, flat piece. Using your tape measure and T-square or triangle map out the dimensions with pencil. Try to keep it straight.
Using your cutting edge (preferably metal), razor and cutting surface slice along the pencil marks getting rid of excess cardboard.
Step 5: Making The Sides
From the new crease measure the needed depth (sconce depth + 2") and repeat folding technique.
The sides are done!