Skip to main content
Add as a preferred source on Google

Can TDDs impact funding?

  • By Neall Digert
  • 09/01/15

As more states move from enrollment to performance-based funding systems, colleges and universities need to find ways to fuel student achievement.

Numerous studies have shown that daylight in classrooms plays an important role in student performance. Its natural brightness, variability and perfect color rendition help students stay alert, work more productively and perform better.

Yet unlike conventional daylighting options (e.g., windows and skylights), tubular daylighting devices (TDDs) deliver natural light without solar heat gain. The result is a brightly lit, comfortable learning environment that allows students and instructors to excel.

When looking for systems that bring in the most light with the least amount of heat, the light-to-solar-heat gain (LSG) ratio is a key metric. It quantifies the amount of usable light to solar heat transmitted into a space. The higher the LSG ratio, the better. A high-performing fenestration system will have an LSG ratio between 1.0 to 1.5, although recent technological advancements have resulted in breakthrough ratios of 3.0 and higher for TDDs.

Innovations prompting this include patented and proprietary daylight-collection domes, lenses and reflectors that maximize light capture and reject heat at the rooftop. Reflective tubing with integrated heat-filtering (cooling) properties further increases performance by transferring large amounts of daylight while minimizing heat gain.

Systems with daylight collectors raise the LSG ratio even higher because they capture natural light that typically bypasses the daylight collection system. In such instances, previously unattainable values nearing 5.0 are possible.

With TDDs, higher education facilities now have a viable solution that promotes student achievement and offers an advantage when it comes to performance funding.

This article originally appeared in the issue of .

About the Author

Neall Digert, Ph.D., MIES, is vice president of Product Enterprise for Solatube International, Inc., Vista, CA (www.solatube.com).

Featured

  • University of Kentucky Receives $150M Gift Toward New Arts District

    The University of Kentucky’s Board of Trustees recently received a $150-million gift from The Bill Gatton Foundation, according to a university news release, to build a new arts district on the campus in Lexington, Ky. The new district will feature a new College of Fine Arts building and a multi-hundred-seat theater, among other amenities.

  • Wisconsin District Breaks Ground on New Elementary School

    The School District of La Crosse in La Crosse, Wis., recently broke ground on a new elementary school that will consolidate the students and staff of two existing schools, according to local news. Funding for the school comes from a $53-million referendum approved in 2024.

  • LSU Breaks Ground on $200M Residential Project

    Louisiana State University in Baton Rouge, La., recently broke ground on a new residential complex, according to university news. The South Quad residential project will consist of two buildings and add a total of 1,266 beds for freshmen students. The development comes with a price tag of $200 million, and it’s scheduled to open to students in fall 2027.

  • How a Portable Sink Helped an Art Classroom Run More Smoothly

    Classroom design decisions can have outsized effects on instructional time and safety at schools juggling mismatched infrastructure, strict budgets, and crowded schedules — particularly in the arts. Between spilled paint and dirty brushes, art classes run smoother with a sink in the studio. But many schools don’t have a sink in every art classroom.