I've had an AeroGarden for a couple of years now, and I've found the built-in LED lights to be quite effective for growing herbs like basil, mint, and thyme. They provide a full spectrum of light and are designed to support growth without additional lighting. In my experience, there's usually no need to supplement unless you have specific plants with unique light requirements. As for optimizing the light schedule, following the AeroGarden's preset cycles often works well, but you can adjust the timing slightly to mimic natural day lengths or suit your home environment better. Just keep an eye on your plants and adjust as needed.