Definition
of a Goniometric Light
Simulates light sources
with complex spatial characteristics using a 2D function to interpolate
data which describes how light is emitted from the source in every
direction. The data is available in one of four text formats from
many lighting manufacturers. These are:
• CIE – Commission
Internationale de l’Eclairage. An international standard.
• IESNA – Illuminating Engineering Society of North
America. A North American standard.
• CIBSE – Chartered Institution of Building Services
Engineers. A British standard.
• EULUMDAT – A German standard.
The main purpose of goniometric
lights is to provide accurate simulation of light sources such
as luminaires, lamps and mantles for architectural visualisation.
excerpt from the TS5 online
help file. Copyright 2001 Caligari Corp.