Develop an interest in art curation. This is essential if you wish to install your lights correctly.
Apply to and be accepted into an art school that has a quality minimal art program. Research the schools you apply to so you can be sure they have instructors who know Flavin's work well enough to teach you how to install it.
Study for many years. This is the most essential step in installing a Flavin light. To correctly install Dan Flavin's lights, you need a knowledge of Flavin's work and working theories, minimal art and the history of art as a whole, architecture and knowledge of fluorescent lights. Dan Flavin's lights are incredibly site-specific, and when he installed them himself, he took all of these factors into account.
Determine what kind of installation you possess. Flavin created different kind of lights that were meant to be installed in different ways, so do research on the specific lights you have. Some Flavin lights are meant to be by themselves, some come in groups with other lights, some are meant to be repeated infinitely in the space available, and all Flavin lights have very specific spaces they are meant to be in. Get in contact with experts in order to correctly determine what kind of lights you have.
Find a suitable place to install the lights. This may sound easy, but it is the hardest part to do correctly. Use the knowledge you have gained in your studies to determine where a suitable location would be. Factors that must be taken into account are the size and shape of the room, the color of the walls, the amount of natural light that gets into the room, the other objects in the room, and even the surrounding rooms and their moods. The best idea for this step is to replicate a situation Flavin used in his work, or at the very least to attempt to install the lights in a similar environment to one used by Flavin.
Hang your lights in as close an approximation to an original Flavin installation as possible. Use references such as existing installations and videos or pictures of formerly existing installations. The effect of a Flavin installation includes not only the light fixture itself, but also the manner in which the light interacts with the rest of the room, so simply hanging it anywhere will not do if you are attempting to install the lights correctly.
Find a wall.
Get a Dan Flavin light.
Get a hammer.
Get some nails.
Hang your priceless art piece randomly on any old wall.