Those are normal (bump) maps... and all the insert lights have them, including the teal arrow lights. How visible they are depends on your camera view and how the global lights and other table lights shine on them. If you want them gone completely... you'll need to open the BAM menu while playing, then goto Dev Options, and goto each texture for every insert image and set the normal map level to 0... then CTRL+C to copy all those settings.... and then exit the table and paste those settings to the table script.
Or leave them in, as they are supposed to be there :)