10:59

Fresnel Lens Manufacturing - 2018 Michigan Lighthouse Alliance Conference

27:00

The Last Hand Cranked & Kerosene (Paraffin) lit Lighthouse in the World. 1998

2:04

Split Rock Lighthouse Clockwork Mechanism

12:33

Fresnel Lens Design and Manufacturing

7:54

Harbor Beach Fresnel Lens Construction

39:32

Lighthouse Illumination Technical Edition

5:59

The Story of the Eddystone Lighthouse (BBC Coast)

3:55

Lighthouse Story (1958)