according to length and width when a photograph is taken from above with evidence located within a notch the indicia clearly shows the sequential designation of the evidence as well as the size of the evidence a light is provided for illuminating the marker the marker is formed of a translucent material which allows light to be emitted through the sides of the pylon as shown in fig3 a battery powered light unit 12 is positioned in an interior of the pylon the light is formed as a modular unit having one or more light bulbs which are powered by batteries the modular light kit snaps into the upper portion of the pylon as shown as fig3 the decreasing cross sectional sides of the pylon afforded by the truncated pyramidal shape of the pylon holds the modular light unit in the upper portion of the pylon a void is formed in the top surface of the pylon so that an on off switch 14 which is formed as part of the modular light unit is accessible from the top of the pylon this position allows easy access to the on off switch of the pylon while allowing the on off switch to be part of the modular light unit the pylon is generally hollow forming an opening 16 in the pylon the base.