tensor light: a special bulb used to grade coins. Tensor bulbs are usually brighter than incandescent but not as blinding as halogen.
Territorial Gold: privately issued gold coins of the mid 1800's. See: Pioneer Gold.
tensor light A small, direct light source used by many numismatists to examine and grade coins.
However, a Tensor light by itself in an otherwise dark room is too bright and will not allow you to properly grade a coin. One important point is to maintain a constant and consistent lighting environment.
 See also: Issued, Treasure coin, Trade, Nickel, Half
  
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