The artist's signature can be seen in the light blue area above the right flipper on the upper playfield. Reportedly, it appears on the backglass in the black area to the left of the 4th player display. The English manual for this game was erroneously published with the playfield wiring schematic for Stern's 1981 'Freefall' instead of the one for this game. The correct one was stapled to the cabinet in one game, and we have modified our Schematics File to show it. Manufacturer data for Lightning: Production Start Date: 3/31/81 Production End Date: 7/17/81 Quantity produced: 2350