Autodesk 256B1-05A761-1301 - AutoCAD Revit Structure Suite 2010, User Manual

Page: 1209 / 1638

A photometric web for a light source
Revit Architecture uses the IES file to make a photometric web to represent the light source. In general, IES
files result in more accurate lighting results in rendered images. For information about the IES file format,
go to
http://www.iesna.org . See Specifying an IES File for a Light Source on page 1178.
Lighting Best Practices
To get the most accurate results in shaded views and rendered images, use the following best practices.
Related topic:
■ Render Performance and Lighting on page 1234
Use IES Files
When specifying photometric properties for a lighting fixture, set the light distribution to Photometric Web,
and use the manufacturer’s IES file , if one is available. Because an IES file provides a more accurate
representation of the light source, you get better results in a rendered image.
To obtain an IES file, go to the website of the lighting manufacturer, and search for ies . Locate the IES file
for the desired lighting product, and save it to your computer. See Specifying an IES File for a Light Source
on page 1178.
Leave Connectors in Place
When displayed in the Family Editor, some lighting fixtures include a connector. In the drawing area, a
connector typically displays a green outline with an orange lighting bolt at the origin.
Lighting Best Practices | 1167