CREATE TABLE table_39508 ("Week" FLOAT, "Date" TEXT, "Opponent" TEXT, "Result" TEXT, "Game site" TEXT, "Kickoff  (  ET  ) " TEXT, "NFL Recap" TEXT, "Record" TEXT)

What is the kickoff time for the game that was at Ralph Wilson Stadium?
SELECT "Kickoff ( ET )" FROM table_39508 WHERE "Game site" = 'ralph wilson stadium'
SELECT "Kickoff ( ET )" FROM "table_39508" WHERE "Game site" = 'ralph wilson stadium'