LIGHTFAIR International® 2018. LEADING THE WAY TO A CONNECTED FUTURE. Light, technology, knowledge and design connect in a convergence of global introductions, innovations and thought leadership at LIGHTFAIR International 2018, the world’s largest annual architectural and commercial lighting trade show and conference. PRE-CONFERENCE: May 6 – 7, 2018; TRADE SHOW & CONFERENCE: May 8 – 10, 2018.