Ben·gal light | \ ˈben-ˌgȯl- 
, ˌbeŋ-, -ˌgäl-, -gəl- \
, ˌbeŋ-, -ˌgäl-, -gəl- \Definition of Bengal light
: a usually blue light or flare used formerly especially for signaling and illumination
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Time Traveler for Bengal light
The first known use of Bengal light was in 1789
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