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On this page, you can manage a database of luminaire description files in various file formats. The luminaires are indexed in "collections", so that you can easily search for their names and numbers. Once you have found the luminaire you were searching for in a collection, you can import it to your current project.
Luminaire collections are maintained per Rayfront installation. If several users run the program off the same installation, then they wil share the luminaire collections as well. The user running Rayfront must have write permission in the directory "library/lumdb" in the installation directory in order to be able to create luminaire collections.
Collection:
This list displays all currently available collections.
Delete...
Remove the selected luminaire collection, after asking
for confirmation.
New...
Create a new luminaire collection. Note that the original
files are still needed after creating a collection, as
the collection database file only contains an index to
map names and numbers to the file name.
File Name:
If a luminaire collection is selected in the list at left,
then this list will display the file names of all
files of the collection.
Luminaire Number:
If a luminaire collection is selected in the list at left,
then this list will display the numbers of all
files of the collection.
Note that this list may have less
entries than the file name list, as several luminaires may
have the same number.
Luminaire Name:
If a luminaire collection is selected in the list at left,
then this list will display the internal luminaire names of all
files of the collection.
Note that this list may have less
entries than the file name list, as several luminaires may
have the same internal name.
![[Luminaire Database Dialog]](images/lumsel.gif)
The lower part of the page is activated when a luminaire in one of the lists above is selected, and displays the most important properties of that luminaire.
Manufacturer:
The entry for the manufacturer as found in the data file.
Note that this is not always the manufacturer who provided
you the file, as some files are created by other entities,
such as the lamp manufacturer (eg. with PAR lamps, where
the luminaire itself has no influence over the distribution).
Lamps:
This lists displays the lamp or lamps as specified in the
selected file. Each line lists the number and the type
of lamps, the total lumens and the consumption in watts.
The Eulumdat file format can contain several variations
of lamps for each luminaire, which will be listed on
seperate lines of the list.
Case Width:
Case Length:
Case Height:
The dimensions of the outmost boundaries of the luminaire
case, or its visible parts for recessed luminaires.
Not all files or file formats include this data.
Luminous Width:
Luminous Length:
Luminous Height:
The dimensions of the actual light output openings of
the luminaire, which is the same or smaller than the
case dimensions.
Not all files or file formats include this data, in
which case Rayfront calculates reasonable values
from other information it has available.
Luminous Area:
The shape of the luminaire (actually the luminous opening)
in plan view. This gives you quick visual feedback to
see what kind of luminaire you have selected, eg. if it
has a circular or a longitudinal shape.
cd/1000 lm:
A simple graphical display of the output distribution of
the selected luminaire.
Import Data to Project
This button converts the data to the Radiance format,
and saves it to the current project. Note that for
files with several lamp variations, only the variation
selected in the "Lamps:" list will be imported.
After this, it is available for editing on the
"Luminaires" page of
this dialog and for selection in the object properties
of the material editing ans assignment dialog.
Note about CIBSE TM14 files:
Since the CIBSE IE14 files don't have a field to
store the total luminous flux of the luminaire (what were
they thinking?), we need to determine that value by
other methods. As a first workaround,
the program will scan the text headers of the file and
apply some simple heuristics to guess if it can find
any useful information there. If any line contains
one of the strings 'lm' or 'lumen', then we will check if the
"word" just before that is a number and use this. Otherwise
we'll look for a number following after the string 'flux',
possibly with a colon or equal sign in between.
If none of the headers contains any of those, then we'll
set the internal value
to 0.
When you import a data set into the project that was read from a CIBSE TM14 format file, then the program will ask you to confirm the value found by the above heuristics. The confirmation dialog will present all header data found in the file, so that you can verify what information is there (or isn't), and how it should be interpreted. If the program didn't find anything, or it took the wrong number, then you sould correct the value according to the information you can find in those headers, or in other documentation supplied by the luminaire manufacturer.
Done - Close the dialog.
Help... - display this information.
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User Manual Overview The Simulation Control Center Menu Items Importing Luminaire Data | |
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Editing Luminaire Descriptions | |
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Luminaire Distribution Diagram |