Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_41919 ( "Series" text, "Host" text, "Launch date" text, "Finale date" text, "Days" real, "Winner" text, "Prize" text )

### Question ###
What is Highest Days, when Launch Date is 23 January 2010?

### Accurate SQL ###

SELECT MAX("Days") FROM table_41919 WHERE "Launch date" = '23 january 2010'