Focal plane in ft (m) is 43ft (13.1m) is the first date lit.
CREATE TABLE table_25597136_1 (date_first_lit VARCHAR, focal_plane_in_ft__m_ VARCHAR)
SELECT date_first_lit FROM table_25597136_1 WHERE focal_plane_in_ft__m_ = "43ft (13.1m)"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_25597136_1 (date_first_lit VARCHAR, focal_plane_in_ft__m_ VARCHAR) Question: Focal plane in ft (m) is 43ft (13.1m) is the first date lit. [/INST] SELECT date_first_lit FROM table_25597136_1 WHERE focal_plane_in_ft__m_ = "43ft (13.1m)" </s>