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Rayfront 1.0 User Manual

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Luminaire Database

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.

Luminaire Database Selection

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]

Luminaire Properties Preview:

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.

Buttonbar

Done - Close the dialog.

Help... - display this information.

Navigation:

Up:
User Manual Overview
     The Simulation Control Center
         Menu Items
             Importing Luminaire Data

Previous:
Editing Luminaire Descriptions
Next:
Luminaire Distribution Diagram
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