If you’ve ever worked with BIM models, you’ve probably heard the terms “level-based BIM” and “face-based BIM.” What distinguishes these light fixture models, and which version is better for lighting professionals?
BIM models include multiple locations where fixtures can be placed or hosted, including the wall, ceiling and floor. Each of these placements includes two options for light fixture models.
The first option is level-based, which considers the fixtures independently of architectural changes. For example, if wall height changes, the location and height of the corresponding fixture remain static.
Face-based BIM is preferred over level-based BIM, because it synchronizes lighting fixtures and architecture – even in linked models. For instance, if the location of a wall in a face-based model is changed, all of the associated lighting fixtures will also move.
The lighting industry intersects multiple disciplines, from structural to architectural. But multiple face-based BIM models can be placed on a linked model that easily moves between all of these disciplines. Thus, face-based BIM creates flexibility when different disciplines are working together.
“Face-based BIM gives lighting professionals a huge advantage because it’s such a malleable platform,” said Rosalind Pumphrey, BIM manager for Eaton’s Lighting Division. “What’s more, it’s an actual template that uses three-dimensional geometry to show how lighting will look on any surface. This gives users an accurate, complete picture of their lighting fixture designs.”