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_7 (years_of_daylight_service VARCHAR, builder VARCHAR)

### Question ###
What is the year of daylight service when the builder was Alco?

### Accurate SQL ###

SELECT years_of_daylight_service FROM table_name_7 WHERE builder = "alco"