There are many options and features to choose from, windows allow access to view the sky and its designed more as a feature. With tubular daylighting devices its all about the ability to spread the natural light evenly.
The best source of natural light is from the sun. From warm (sunrise) daylight to warm (sunset), natural light is the healthier alternative. Capture more of the suns natural light will give your home a more relaxed feel and provide a better colour of light during the day.