EXHIBIT 21 SUBSIDIARIES OF CAROLINA POWER & LIGHT COMPANY AT DECEMBER 31, 1998 The following is a list of certain subsidiaries of Carolina Power & Light Company, their respective states of incorporation, and where applicable, the names under which such subsidiaries do business: Interpath Communications, Inc. North Carolina Strategic Resource Solutions Corp. North Carolina ACT Controls, Inc. (1) North Carolina Applied Computer Technologies Corp. (1) Delaware Diversified Control Systems, Inc. (1) North Carolina Spectrum Controls, Inc. (1) North Carolina - ----------------- (1) Subsidiary of Strategic Resource Solutions Corp.