The mark consists of The word "POTOSINA" stacked above the word "LIGHT," with the letters GHT underlined, in green stylized font, partially shadow outlined in gold, below a coat of arms design containing images of a lion on opposite sides of a gold and white trimmed red shield containing a gold paddle, with two smaller gold paddles on opposite sides. A gold crown and arc are above the shield and a red banner design is below the shield with the number "1907." A design of gold wheat sprigs extends from the left and right of the red banner. Two gold parallel lines are on opposite sides of the coat of arms. Below the word "LIGHT" is a mountain range comprised of two stylized white and grey mountains, with a grey cross at the peak of the smaller mountain on the right side, with gradient gray to white rays above, and a white silhouette of a city below. Two gold isosceles triangles with one apex pointing to the right and the other pointing to the left are directly below the silhouette of a city. To the right of the mountain range is a seal comprised of four gold concentric circles with a green banner outlined in gold across the center of the seal. 10 gold isosceles triangles with the apex pointing inward are placed on opposite sides of the green banner. A large green horizontal stripe above narrow gold, white and red horizontal stripes is above the crown, with a mirror image below the silhouette of a city. A large green perpendicular stripe between two narrow gold perpendicular stripes is to the left of the center images. A thin blue square outlines the image. All of the foregoing is displayed on a white background.