From the Lighting Research Center (LRC) at Rensselaer Polytechnic Institute:

The LRC “recently released a guide for designing light scoops—an innovative type of skylight designed by the LRC with funding from the New York State Energy Research and Development Authority (NYSERDA).”

Light Scoops: A Design Guide demonstrates how to design light scoops to meet target light levels and includes a performance comparison of light scoops vs. conventional skylights.

From the LRC:

“Many conventional horizontal skylights provide too much sun on days that are warm and sunny, and too little sun on days that are cold and dark. The LRC’s new light scoops design balances out these daily and seasonal fluctuations in light level and temperature by providing less light in summer and more light in winter, while accounting for the natural pattern of the sun as it travels across the sky. “