| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| For centuries, wood was the main fuel used in lighthouses; in the 1700s, this animal product became the primary source | whale oil | $200 | J | LIGHTHOUSES | 2015-07-21 | #7117 | |
| Completed in 1716, Boston Lighthouse, America's first, was illuminated by this type of oil | whale oil | $400 | J | LIGHTHOUSES | 1991-06-13 | #1579 |