Important: Make sure your spectrophotometer is connected to a USB port directly on your computer and not to a USB hub The XRite I1 Pro are powered via the USB port,. If the power supply from the USB port is not sufficient, the spectro will be recognized, but at the time of calibration the software will go into error.
Please note that some OEM XRite I1 Pros cannot measure illuminants.
#### 1) Creating the LCTRL file First of all, the first step is to create the Light Control file (.lctrl) containing the information associated with the cabin you want to control and the choice of the cabin type P1 or P2. Click on the "Light Control" icon [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-1.png) Click on the "Create reference" button [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-2.png) Fill in the fields In this new window, fill in the "Name" field, then click on the "Save and quit" button The other fields are optional, they are only used to add information when you create the measurement reports. Define the P1 or P2 standard depending on the type of cabin you want to control. [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-3.png) The "Light Control" file will appear in the left column. [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-4.png) #### 2) Cabin Control ##### Connect your spectrophotometer Your spectrophotometer name should appear in the top right corner [](https://wiki.coraye.com/uploads/images/gallery/2024-09/light-control-6b.png)Important: Make sure your spectrophotometer is connected to a USB port directly on your computer and not to a USB hub The XRite I1 Pro and Konica Minolta Myiro are powered via the USB port,. If the power supply from the USB port is not sufficient, the spectro will be recognized, but at the time of calibration the software will go into error.
##### Let's start controlling your cabin Select the previously created "Light Control" file in the left column, then right-click to select "Start control" [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-5.png) Click on the "I'm ready" button [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-6.png) Make sure your spectrophotometer is set to its reference white, then click on "Start calibration" [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-7.png) Once calibration is complete, install the light diffusion cap on your spectrophotometer.Please note, you must use the cap to read the light with Konica Minolta MYIRO, XRite Eye One Pro 1, 2, 3 and 3 PLUS.
| Konica Minolta MYIRO | [](https://wiki.coraye.com/uploads/images/gallery/2021-08/image-1628604011666.jpeg) |
| XRite Eye One Pro 3 & 3 PLUS | [](https://wiki.coraye.com/uploads/images/gallery/2021-08/image-1628603927152.png) |
| XRite Eye One Pro 2 | [](https://wiki.coraye.com/uploads/images/gallery/2021-08/image-1628604094981.png) |
| XRite Eye One Pro | [](https://wiki.coraye.com/uploads/images/gallery/2021-08/image-1628604638148.png) |
You have the option to re-measure by selecting the desired area The measurement values are displayed under each measurement area.
Once the 9 zones have been measured, click on the "Reading done" button. Note that this remains grayed out until the 9 zones have been measured. [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-9.png) ##### Control report Once the measurements are completed, the reading report is displayed [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-10.png) At the top right, the control history is displayed and allows you to view previous controls. [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-11.png) By clicking on the "PDF" button, you can obtain a report [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-12.png) Displaying the report: [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-13.png) By clicking on the "PDF" button, you can obtain a label [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-14.png) Displaying the label [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-15.png) ##### Printing the label on a Dymo label printer To print a label, install a label printer and its driver, then click on the printer icon when you display the label. [](https://wiki.coraye.com/uploads/images/gallery/2021-09/dymo.jpeg) ##### Saving the ".lctrl" file It is strongly recommended to save your control file to avoid losing it or to share it. [](https://wiki.coraye.com/uploads/images/gallery/2024-08/light-control-16.png) #### 3) What You Need to Know About Controlling Your CabinsThe CIE Color Rendering Index (CRI) is a method of determining how well the illumination of a light source on eight samples compares to that provided by a reference source. Together, the CRI and CCT provide a numerical estimate of which reference (ideal) light source most closely matches a given artificial light and how much the difference is. The CRI is a quality index for evaluating an illuminant. It is expressed as a percentage. The higher the value, the better the quality of the illuminant.
The color temperature of a light source is the temperature of an ideal blackbody radiator that emits light of a color comparable to that of the light source. Color temperature is a characteristic of visible light that has important applications in lighting, photography, videography, publishing, manufacturing, astrophysics, horticulture, and other fields. In practice, color temperature is meaningful only for light sources that actually correspond fairly closely to the radiation of some black bodies, that is, light ranging from red to orange to yellow to white to bluish-white; it makes no sense to speak of the color temperature of, for example, green or violet light. Color temperature is usually expressed in kelvins, using the symbol K, a unit of absolute temperature.
Color temperatures above 5000 K are called "cool" (bluish) colors, while lower color temperatures (2700–3000 K) are called "warm" (yellowish) colors. "Warm" in this context is an analogy to the radiated heat flux of traditional incandescent lighting rather than the temperature. The spectral peak of warm-colored light is closer to the infrared, and most warm-colored natural light sources emit significant infrared radiation. The fact that "warm" lighting in this sense actually has a "cooler" color temperature is often a source of confusion.
Source: [Wikipédia](https://en.wikipedia.org/wiki/Color_temperature) [](https://wiki.coraye.com/uploads/images/gallery/2021-08/image-1628606121525.png) --- ##### Control your booth or viewing conditions IllumReader can be useful to check uniformity, color temperature, light intensity in a booth and to check the viewing conditions of proofs, objects and prints. In the field of graphic arts, ISO standards have been defined to standardize the viewing conditions of prints. Knowing how to control your light is in a way knowing how to control color.| Viewing condition | P1 Critical Comparison | P2 Practical Appraisal |
| [](https://wiki.coraye.com/uploads/images/gallery/2021-08/image-1628602227797.png) | [](https://wiki.coraye.com/uploads/images/gallery/2021-08/image-1628602206892.png) | [](https://wiki.coraye.com/uploads/images/gallery/2021-08/image-1628606732447.png) |