Hempseed oil lit the lamps of the legendary Aladdin, Abraham the prophet, and in real life, Abraham Lincoln.
It was the brightest lamp oil.
Hempseed oil for lamps was replaced by petroleum, kerosene, etc., after the 1859 Pennsylvania oil discovery and John D. Rockefeller’s 1870-on national petroleum stewardship. (See Chapter 9 on “Economics.”) In fact, the celebrated botanist Luther Burbank stated, “The seed [of cannabis] is prized in other countries for its oil, and its neglect here illustrates the same wasteful use of our agricultural resources.”
(Burbank, Luther, How Plants Are Trained To Work for Man, Useful Plants, P. F. Collier & Son Co., NY, Vol. 6, pg. 48.)