| http://www.w3.org/ns/prov#value | - A dental lighting fixture comprising: an optical system including an ellipsoidal reflector having a light source disposed at one focus thereof; a fixed light gate disposed in front of said optical system, said gate having a rectangular opening disposed at the other focus of said ellipsoidal reflector; a lens disposed in front of said light gate, said lens having a spheric side facing said light ga
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