By making calculations, one can determine how an armature will spread its light
By making calculations, once can determine how much light the armature will spread
Calculations can make clear how much light (lamps) are needed to illuminate a room, thus reducing waste of light and the prevention of unnecessary costs (energy cost).

Luminaries' calculations can be made with EasyPlan for Windows. This full program can be downloaded for free through the link at the bottom of this site.

Easy to use, but living up to the latest in illumination techniques. EasyPlan for Windows creates calculations more perfect and better to look at. It differs from the rest by a solid light-technical basis and an open structure. All armatures can be used. The program can calculate and render diffuse light and shadow effects in a refined way. Even indirect is calculated perfectly. Find out that EasyPlan is a perfect tool to bring your illumination-plans alive. Or even for a light-technical control. EasyPlan is produced by light-technical engineers of PRC Krochmann GmbH in Berlin (Germany) and is released in Dutch with support by Van Doorn.

Manufacturers: Photometry Radiometry Colorimetry Krochmann GmbH; Research and fabrication of light-lab equipment and software. Berlin (Germany)

Dutch adaptation / manual : Johan G. Smits - Van Doorn

Usage targets:

- Presentation of light technical data of armatures
- Making of extremely accurate illumination calculations
- The rendering of light-distribution and shadow effects in furnished interiors


Non-commercial: This software is released on the Dutch market without commercial intentions.

Open structure: Data of ornaments and armatures of multiple developers and manufacturers can be imported or entered.

The structure: You use the program through tabs. Menu options only appear when you need them. You start with a project. Every project can contain many rooms. Every room can contain many layouts. Every layout can be provided with many armatures of any manufacturer.

Technical specifications:

- Areas up to 1000 by 1000 metres
- Creation of complex rooms
- Diagonal wall or ceiling faces
- Objects / furniture with its own ambience and reflection factor
- Transparency
- Blinds calculation (UGR)
- All objects can be fully rotated
- Extreme precision through fine grid
- Calculation of horizontal and vertical illumination and luminance
- Calculation of virtual areas

You can download the non-registered version of
- EasyPlan for Windows (4.27mb) and the
- EasyPlan Dutch Manual (zip 1.4mb).

Without registration, there is no restriction in use. Only thing is, that when you print your pages, a watermark indicates the program has not been registered.

Manual Easyplan for Windows NL

The EasyPlan Dutch Manual can be downloaded in PDF-format (1.5mb). It does not differ from the printed version, only are the images in full colour. With the Adobe© Acrobat Reader you can easily search for a subject, line or word. Besides, you can zoom into an image.


Files with light-technical data

Over 1500 of Van Doorn armatures. For the making of calculations with Van Doorn armatures you'll need the files with light-technical data. You can download these in a ZIP file (750kB). In the zip file are the armatures in the so-called EULUM-DAT format, with an LDT extension.
With EasyPlan you can select the needed armatures and add them to the internal database of the software.

Good luck!