I know little to nothing about electric, but I was looking for an affordable under-cabinet lighting solution that didn't require batteries. After a bit of internet research and a few YouTube videos I felt pretty confident I could install these lights myself without my husband's assistance.
The kit came with an adapter for the outlet and a dimmer on/off switch. I also ordered some HitLights connectors (6ft for the sink and microwave, 4 pack of 6 inch connectors to go between cabinets) which were pretty easy to use. It took a little effort with a pocket knife to force the plastic covers open on the connectors.
The install went pretty smoothly, I started with the piece closest to the outlet and worked around from there, checking the lights at each connection. There's no flickering, but the lights at the end of the run are slightly more dim than the lights at the beginning.