Researcher Jie Feng, B.Eng and M.AppSc, began a one-year study as of January 3, 2005 to model the reflective fabric egg crates and geometrically analyze the relation between solar position and daylighting quality with Lighttex and comparatively sized blind/louvers.

The results of this study regarding two daylighting quality factors, illuminance uniformity and blocking of direct sun, indicate significant potential for Lighttex as a daylighting tool.

ILLUMINANCE UNIFORMITY
Lighttex panels and blind/louvers with various cell/strip sizes were modeled with lighting analysis software AGI32 during hourly time periods from 7:00 am to 7:00 pm on March 21, June 21, September 21 and December 21. Variances in uniformity were calculated under both clear and overcast sky conditions.

BLOCKING OF DIRECT SUN
Lighttex Sun Blocking Calculator calculates the amount of direct sun blocking with Lighttex and blind/louvers during the same time periods.

Try our exclusive Sun Blocking Calculator.

See these tests in detail here.


© 2005 Lighttex Canada, Inc

1. Lighttex blocks more portion of direct sun penetration than blind/louvers. When direct sun cannot be blocked completely, large glare areas are reduced into smaller shadow/highlight patterns which move rapidly and minimize heating.

2. Lighttex provides a significant increase in uniformity, better than blind/louvers too especially along the east-west axis. The north-south axis also has increased uniformity and daylight penetration deeper into the space.

3. Lighttex brightens dark corners, enlarging the regularly occupied area.

4. Less direct sun entering in bright and warm weather makes the environment more visually comfortable and saves energy by reducing the need for air conditioning.

5. Lighttex enables occupants to be connected to exterior views, while providing some degree of privacy.