POWER OF ELECTRIC SEARCHLIGHTS.
Probably not one person among a hundred has even an approximate conception of the illuminating power of one of the great modern electric searchlights, and it is only vaguely understood that it must be something enormous. As a matter of fact, with the projecting reflectors in use which serve as multiplying factors for the actual candle-power of the electric arc, the illuminating capacity of the beams issuing from one of the large modern searchlights has been placed at the equivalent of something over two hundred million candles. Just what this means is not easily realised, though a popular measure of the lighting power is afforded by the statement that, under favourable atmospheric conditions, one of these large lights can be seen nearly a hundred miles away, and will illuminate objects at a distance of almost twenty miles with sufficient clearness to make their examination possible with the aid of a fieldglass.
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Southern Cross, Volume 2, Issue 3, 21 April 1894, Page 3
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155POWER OF ELECTRIC SEARCHLIGHTS. Southern Cross, Volume 2, Issue 3, 21 April 1894, Page 3
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