Quantity   Component name
1 × Voltage Power Tester LED Quick Test Light Box with (4) E27 Lamp Wattage Tester Light Voltage With Display
1 × Pushbutton switch - NO (normally open), 6A, 5/8" (OPTIONAL)
1 × 16/3 (16 gauge, grounded) extension cord - Approx 8 foot
1 × Miscellaneous short lengths 16AWG stranded hookup wire
2 × Zip ties
2 × Heat shrink tubing, liquid electrical tape, etc.
4 × Incandescent (ONLY) light bulbs - various wattages as desired (I used 25W, 40W, 60W, 100W)