After an amicable split from Group One Ltd., where he was employed as director of lighting design and as a technical consultant, Patrick Dierson has set up his own company, DiersonDesign. For more information on his lighting design and programming services, please contact the company by phone at 516/271-3995 or by e-mail at pdierson@ix.netcom.com. In Group One news, the firm has appointed Los Angeles-based Forman & Associates to represent its lighting division on the West Coast.

Sylmar, CA-based GTY Industries, best known for its Noral and Hydrel product lines, has been acquired by Conyers, GA-based Lithonia Lighting, a move that strengthens Lithonia's outdoor lighting package. The purchase includes tooling and equipment, plus all patents, trademarks, and other intellectual properties. Craig Jennings, formerly GTY's president, will remain as vice president of Hydrel.

W.A.C. Lighting has opened an 82,000-sq.-ft. (7,380 sq. m) corporate headquarters, design center, and warehouse. The address is 615 South Street, Garden City, NY 11530; phone: 516/222-5230, 800/526-2588, fax: 516/222-5231, 800/526-2585. The firm has also opened a 100,000-sq.-ft. (9,000 sq. m) production facility in China, manufacturing and assembling all its lighting products.