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A modern dive light usually has an output of at least about 100 lumens. Bright dive lights have values from about 2500 lumens. Halogen lamps provide this light at over 50W power consumption. High-intensity discharge lamps (HID) [6] and Light-emitting diodes (LED) can provide similar output for less power. [8]
The White Shoal Light is the prominent design element in the "Save Our Lights" license plate for the State of Michigan; the sale of which helps fund lighthouse preservation. [28] Michigan is the only state that supports lighthouse preservation with a program that includes annual grants from the state to local preservation groups.
A good launch point is the south end of the island of Grosse Ile, Michigan. [18] It was added to the National Register of Historic Places as Detroit River Light Station on August 4, 1983, reference number 83000886. [2] The light has been memorialized in sculptures. [13]
A magnesium torch is a bright light source made from magnesium, which can burn underwater and in all weather conditions. They are used for emergency illumination for railroad applications. They were also used in the 1950s up to the early 1970s as a light source for scuba diving, and were featured occasionally in television shows. A relay of ...
The Harbor Beach Lighthouse is a "sparkplug lighthouse" located at the end of the north breakwall entrance to the harbor of refuge on Lake Huron. [9] [10] [11] The breakwall and light were created by the United States Army Corps of Engineers to protect the harbor of Harbor Beach, Michigan, which is the largest man-made freshwater harbor in the world.
The aurora borealis or northern lights in, of course, the north, and aurora australis, or southern lights, in, well, the south, are a natural light display in the sky.
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