It actually only takes one knowledgeable audiophile with some experience and technical skills. It's not too difficult. But after the bulb is installed, burnt in, and calibrated you'll need at least two people to do room treatments and place infrared traps in the corners.
How many audiophiles do you need to change a lightbulb?
Only one.
But ten to discuss whether you need a 60W or a 100W bulb.
Ten more to discuss the relative merits of screw-in vs. bayonet fixture.
Ten more to discuss the relative merits of LED and halogen.
Ten more...…………………..