Electrician License In Tn Under What Circumstances Is An Electrician's License Required?

Under what circumstances is an electrician's license required? - electrician license in tn

I bought a transformation downlights. I want to install the lights, and with the wiring of the age of the lamp. Can I as an owner, otherwise I would have to hire a qualified electrician? Can a house verifier requests a letter from a licensed electrician before filling in your estimation? This is a modification of the existing lighting.