2 x 4 Lamp by arthur liu Weekly Assignments 2 x 4 Lamp 2 x 4 Lamp 2 x 4 Lamp 2x4 Lamp 2 x 4 Lamp 2 x 4 Lamp Assignment #6: midterm. Assignment #4: modeling. Assignment #3: electronic prototype. Assignment #2: reverse engineering. Assignment #1: product sketch.