PITTSBURGH — A survey shows Pittsburgh's Light Up Night might not be such a bright idea.

The Pittsburgh Downtown Partnership surveyed 177 people and found 79 percent said they did not spend any money in department stores during the mid-November event, which kicks off the city's Christmas shopping season. Eighty-five-percent said they don't spend money in specialty stores, either.

Still, partnership president and CEO Mike Edwards said the celebration does some good.

The company that did the survey estimates 200,000 people attended the event last year and spent a total of $5.1 million. And the survey shows those who did spend money spent a lot: more than $200 each in department stores and more than $180 in specialty stores.

PITTSBURGH — A market study claims Pittsburgh must ensure Saks Fifth Avenue stays downtown if it wants the area to be relevant and regain some of its old grandeur.Pittsburgh has been hurting financially and demographically for 30 years since the steel mills that made it famous shut down.The study released Monday said Pittsburgh must offer incentives to ensure Saks remains downtown and also work to revive other streets. The city also should focus on attracting student shoppers from downtown universities.Previous attempts to revive downtown Pittsburgh have failed. But downtown advocate Michael Edwards said downtown office occupancy and the residential population are on the rise, both encouraging signs.

PORT ALLEGANY — More than 100 employees at Pittsburgh Corning's glass block plant in north central Pennsylvania will remain laid off for at least five weeks longer than expected.Production at the plant in Port Allegany shut down July 1 and was expected to resume later this month. But now the company says the shutdown will continue through at least Oct. 1. The company said it has enough inventory on hand for its customers and doesn't need to produce any more.About 70 employees are still on the job. The plant about 130 miles northeast of Pittsburgh employs about 175 people when running at full capacity.Pittsburgh Corning is a joint venture between PPG Industries and Corning.

NEW STANTON — Sony said consumer demand for its flat-screen LCD televisions is driving up its demand for employees at the company's television manufacturing plant in southwestern Pennsylvania.The Sony Technology Center-Pittsburgh has 850 workers in its assembly plant, which is actually located about 30 miles southeast of the city in Westmoreland County. That's up from 600 workers last summer after the company saw a series of layoffs.Workers at the plant make two different 46-inch Bravia model televisions for Sony. A spokesman said the plant will also resume making a 52-inch television.