4Wall Entertainment has announced the addition of Jack Valencia to its Las Vegas-based lighting production team. Valencia, formerly of Spurgeon Design Group/Pro Sound Inc., has been in the lighting industry since 1982. He began his career working with musical acts such as Natalie Cole, Diana Ross, and Sting. From July 1998 to April 2002 he worked for Entertainment Technology Group, where he wrote design criteria for all Mirage Resort Properties, including Bellagio Hotel Fontana and High Limit Lounges, Danny Gans' Theater, and the Mirage Hotel in Las Vegas. More recently, he has completed lighting design projects for popular nightspots such as the Knitting Factory in Hollywood, CA, the Shadow Bar at Caesar's Palace in Las Vegas, and ZAX Lounge at the Golden Nugget in Las Vegas.