24|AULA cd sort of “demo”. To access more luminaries, you have an “online” option from the insert window of a new luminary that will bring up close to 80 brands of luminaries in the list of manufacturers. Each one will include a list of luminaries, and when you hover over any one of them, their characteristics will appear. Contrary to Dialux, we can modify some of the characteristics, such as type of lamp, potency and color, as long as the luminary allows multiple choices. It also has the option of downloading Relux’s Plug-ins from the different manufacturers of luminaries to access them. Calculux offers a program with a wide luminaries’ data base from the Philips factory, proprietor of the program. When selecting the option of inserting a luminary, a window with all the luminaries from the data base opens. Something interesting about it is that, if in the data of the place, you have specified the level of average light desired, when you select a luminary, you will see, at the bottom of the screen, the number of luminaries of that type needed in the project. The luminaries included in the program are presented in PHILLUM (of Phillips Luminaries) format. Calculux allows the use of photometric data from other manufacturers. All three programs allow changing the type of lamp of the luminaries, but differently .In Relux, at the time of selecting and importing a new luminary. In Dialux, you can access its characteristics in the list of objects. Apart from its main information and a picture you will get the IES diagram, the lamp used, its luminous flow, its potency and correction factor. You will notice that you have the option of changing the lamp, as long as you have the Plug-in of a lamp factory in your computer. Accessing through the menu of data of luminaries of the project and selecting any of them, you can select the option “Change”. A window with all the characteristics of the luminary will open. In the tab “Description” we change the data related to the lamp and the maintenance factors of the luminary and the lamp. With all three programs, you can insert a luminary in any point of the space and orient it in the three spatial axes. This data can be modified visually, that is, by dragging the luminary through the space to the desired spot and even spinning it selecting any one of its axes, or better still, from its table of characteristics and editing. 3. Numerical Data Relux is very intuitive and comfortable in the numerical and graphic output of data. When you select “Print”, a window opens with a complete list of the output data, arranged by categories and files, and correctly named. In the center it shows only the data that has been selected to be printed and at the right, a preview of the selected page. This last one is very useful for selecting from the list what we want to print, because when you hover over any data, you can see how the page would look with it. Once the calculations are over, we can obtain through the system, a brief summary of them containing: a plant with fake colors representing the illuminances, the maintenances factor, total flow of all the lamps, total potency Imagen de iluminación natural y artificial: Relux (superior), dialux (inferior).