: An Arduino or similar microcontroller is standard for connecting IR emitters/detectors to make the installation interactive.
: Use one primary light source to create a predictable fall of light, which is easier to control for beginners. fall-of-light-installation-tutorial
: Install the bulb and turn the power back on to test the circuit before finalizing the trim or cover. How to Shade a Drawing (Light & Shadow : Part 2 of 3) : An Arduino or similar microcontroller is standard
How to Paint a Portrait in Oil - Part 3 of 5 - Will Kemp Art School fall-of-light-installation-tutorial