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_name_12 (average_annual_output__million_kwh_ INTEGER, name VARCHAR, installed_capacity__megawatts_ VARCHAR)

### Question ###
What is the Average annual output for Culligran power station with an Installed capacity less than 19?

### Accurate SQL ###

SELECT AVG(average_annual_output__million_kwh_) FROM table_name_12 WHERE name = "culligran" AND installed_capacity__megawatts_ < 19