Solar Powered Color Changing Hummingbird Feeder. This popular hummingbird feeder is more than it seems. It feeds your hummingbirds by day, with 10 ounce capacity, 4 feeding ports. By night it becomes a solar powered bird feeder. The solar panel on top powers the lovely constantly changing light show from red to blue to green. The translucent bottom of the bird feeder lets the light shine out down thru the bottom with an eye catching display in the darkness.