Even an 8,000-square-foot showroom gets crowded when you squeeze in more than 300 lines, from Hinkley and James Moder Crystal to one-of-a-kind finds from Parisian flea markets, plus all the exclusive products of a Lighting One showroom. Luckily, staffers schooled in interior design can help narrow the selection or dream up some bright ideas for indoor or outdoor lighting plans. An in-house electrical supply business offers technical assistance, installation and free delivery.