The Duluth Inner Range Light. This light display a flashing white light. Lining up this light with the steady green light at the end of the pier, the mariner could tell how far they were from the pier and whether or not they were approaching it at an angle or straight.
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Another view of the Inner Range Light.
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The original 5th order Fresnel lens from the light.
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A closeup of the 5th order Fresenl lens. Note that this lens has multiple "bulls-eyes" and when rotated, it produced a flashing light as the beams swept across the lake.
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A 1000 watt lamp that was used as the light source for this lighthouse.
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Duluth Inner Range Light, Summer 2006
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Duluth Inner Range Light, Summer 2006
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