CREATE TABLE table_41919 ("Series" TEXT, "Host" TEXT, "Launch date" TEXT, "Finale date" TEXT, "Days" FLOAT, "Winner" TEXT, "Prize" TEXT)

What is Highest Days, when Launch Date is 23 January 2010?
SELECT MAX("Days") FROM table_41919 WHERE "Launch date" = '23 january 2010'
SELECT MAX("Days") FROM "table_41919" WHERE "Launch date" = '23 january 2010'