STROBE SOFT BAIT Lures have strobe LED lights that activate when the lure is submerged in the water and motion is activated. Two metal prongs on the bottom of the lure makes the connection and the strobe starts to activate. 
They are effective for Musky, Pike, Walleye, Bass, Trout and Salmon.
These work well because the red flashing color imitates a bleeding bait and attract the fish to attack.
WATER + MOTION = FLASHING LIGHTS (FISH STRIKES)