user: Question: What was segment C when segment D was Fluorescent Tubes? 
Columns: ['Series Ep.', 'Episode', 'Netflix', 'Segment A', 'Segment B', 'Segment C', 'Segment D']
Types: ['text', 'real', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1-01', 1.0, 'S01E01', 'Aluminum Foil', 'Snowboards', 'Contact Lenses', 'Bread']
SQL:

assistant: SELECT "Segment C" FROM "Table" WHERE "Segment D" = 'Fluorescent Tubes';