There's really no substitute for natural light and its many design and personal health virtues. That’s why skylights exist even in a world with artificial lighting. But of course, for all their positive attributes, skylights have always gone dark when the sky does. That means you would need to pair a conventional skylight with at least one electric light, depending on the dimensions of the space in question. In some rooms, it wouldn’t look amiss for the ceiling to feature multiple fixtures, but in a sensitive area like a windowless hall, the space would seem cluttered. Here, bear in mind that there’s another possibility: When equipped with an optional light kit, the Solatube Daylighting System becomes the one lighting solution that can respond to all your needs, no matter the time of day. In a formerly dim hallway, the Solatube system delivers natural light from dawn to dusk. Then at night (or in the event of cloud cover), the same device outputs electric light via embedded incandescent or CFL bulbs. Add in the occupancy sensor, and you can ensure the electric lighting turns only when necessary. In this way, Solatube provides a single, streamlined, multifunctional fixture capable of around-the-clock illumination.