The Chicago Cubs announced yesterday that if the ballclub qualified, it would not play World Series games at home "because of the light situation in Wrigley Field," the last major league ballpark without lights.

General Manager Dallas Green said in a letter to season ticket holders that "it is also possible" the team's home dates in any National League Championship Series would be moved. The Illinois Supreme Court is investigating the constitutionality of state and city laws that effectively ban night baseball at Wrigley Field.

Commissioner Peter Ueberroth had informed the ballclub and its owners, Tribune Co., that ABC-TV, which will televise some postseason games, decided to exercise an option in its contract with league owners to have all such games played at night.

"We have now reached the point where it is too late to have permanent lights at Wrigley Field this year due to long lead times necessary in ordering specialized equipment," Green wrote. He added "we don't believe that temporary lights will work for major league baseball -- maybe for college football and baseball -- but not for us."

Green said he had asked his staff to study the possibility of a new stadium and to review possible sites, both within the city and surrounding suburbs -- a possibility he has raised several times in recent weeks.