We found a new twinkling led battery powered string from Target last week.. it has 16 lights, and 4 of them flash.
We soldered the toggle switch to the poitive wire, so the battery pack can remain on, and the toggle switch controls them. The back flashing light is one of the flashers, the string runs into the trap cartridge, for lighting in there, and then one steady on light, and two flashing lights go into the front display.
Not movie accurate on the front, but for $8 we had working lights for our traps!