The Chicago Cubs are willing to remain in Wrigley Field, but only if allowed to install lights to be used for at least 18 to 20 games a season, team President Dallas Green said.

Green denied the team had planned to move from Wrigley Field and that a site selection in the suburbs has been set. However, he emphasized the time was rapidly coming when, if the community does not compromise, the Cubs will have no choice but to move.

Green's comments came one day after reports circulated that the Cubs, frustrated at attempts to repeal antilights legislation, were set to move to suburban Schaumburg and abandon Wrigley Field . . .

A group that includes Westinghouse Electric Corp. Chairman Douglas D. Danforth emerged as the only local potential buyer for the financially troubled Pittsburgh Pirates.

James C. Roddey, an advertising company executive who planned a bid for the team, withdrew in favor of the new group, according to attorney Carl Barger, whose firm is supplying free legal support to potential owners of the National League team. Barger, at a news conference, said Danforth and other businessmen form the "only local group that I know of" attempting to buy the Pirates from the John W. Galbreath family . . .

The D.C. Baseball Commission is almost halfway to its goal of 10,000 season tickets sold for an as-yet-nonexistent team. It was announced yesterday the commission has sold 4,421 season tickets, meaning $2,506,707 is in escrow accounts at 29 banks and their branches around the area.