Landscape lighting continues to make LED improvements in quality and pricing. Retrofit bulbs have really improved in the last few years and are really the norm now. The LED fixtures with bulbs built into the fixture are still being widely used but the retrofit LED bulbs are usually a more cost effective way to go. You can easily update existing systems to become LED systems in most cases. You need to be aware that some LED bulbs are only rated for enclosed fixtures while other bulbs are rated for wet locations which can be the case with some path lights.