The direct replacement LEDs for the incandescent navigation lights is a significant upgrade in lumens, plus you will in all likelihood never have to replace them. An LED landing light is also a no-brainer. They are effectively brighter than the incandescent lights, and again have a lifetime that may exceed your ownership of the aircraft. With their extended lifetimes, you can afford to use them on takeoffs and approaches to improve visibility of your plane to other traffic, without significantly sacrificing longevity.