When I did mine (ton of experimenting) went as easy as I could. I used a string light from a necklace and a fashion style size bait so the two were just right for each other. The battery pack was small enough it fit up in the hoove. The hardest thing was positioning the lights where I wanted them. I made a hole for each one and getting them in without damaging the circuit was really difficult for me. I had to redo it a whole bunch of times before I got it the way I liked it.