What was segment C when segment D was fluorescent tubes? 
CREATE TABLE table_15187735_1 (segment_c VARCHAR, segment_d VARCHAR)
SELECT segment_c FROM table_15187735_1 WHERE segment_d = "Fluorescent Tubes"
### Context: CREATE TABLE table_15187735_1 (segment_c VARCHAR, segment_d VARCHAR) ### Question: What was segment C when segment D was fluorescent tubes?  ### Answer: SELECT segment_c FROM table_15187735_1 WHERE segment_d = "Fluorescent Tubes"