FAQ

DIALux evo is a comprehensive planning tool that provides you with all the necessary functions for professional lighting design free of charge. You can calculate and visualize lighting for indoor and outdoor areas. From entire buildings and individual rooms, to parking spaces and road lighting, with artificial lighting, daylight and emergency lighting. DIALux evo supports you in verifying regional or international standards and helps you to document this verification. Learn more about the capabilities of DIALux evo here.

The latest version is DIALux evo 13.1 (5.13.1.0, 04/29/2025). Learn what’s new in the latest version. You can find a detailed version history here.

DIALux is free of charge for users. Anyone can use DIALux for personal, educational and commercial purposes. Luminaire manufacturers can present their brand in DIALux and offer detailed product data for planning. To do so, manufacturers need to buy a DIALux membership and these membership fees fund the development of the DIALux software. Additionally, since 2020, we also sell extensions/add-ons for DIALux to users by subscription. Learn more about our business model here.

Starting with DIALux evo 11, you need a user account to log in when starting the software, your DIALux ID. Registration is possible directly in DIALux. It is done rapidly and, of course, free of charge. With your DIALux ID you can also use other DIALux offers, such as the DIALux Community or our User Support. More information about the DIALux ID is available here.

We cooperate with all leading brands in the lighting industry. You can download their catalogues here to use the products in DIALux. DIALux is open to standard photometric file formats like EULUMDAT *.ldt or *.ies. You can support DIALux by using products and data from DIALux members. Learn more about our business model here.

As DIALux evo is a 3D CAD application, you benefit from a powerful multi-core CPU and graphics card and a sufficiently large main memory (RAM). We currently support CPUs with an x86-64 architecture (e.g. AMD and Intel). CPUs with ARM architecture are not currently supported, but we are looking into supporting ARM CPUs for a future evo version. The RAM should be at least 4 GB; we recommend 8 to 16 GB for professional use. Your graphics card should support OpenGL 3.2, and a large memory is also helpful here: at least 2 GB, 4 GB+ is recommended. Please keep your GPU drivers as up-to-date as possible. DIALux evo runs only on 64-bit Windows 10 and Windows 11.

We develop DIALux evo for Windows environments and have currently no plans to provide a Mac version in the future. We know that it is possible to run DIALux evo on a Mac by using virtualization software such as Parallels or Fusion. Check out Google and you will find some first-hand information from users who have successfully done so. Please understand that we do not provide support for problems on Mac systems.

DIALux supports the following languages for GUI and documentation: Čeština, Dansk, Deutsch, Eesti, English (UK/US), Español, Français, Italiano, Magyar, Nederlands, Norsk, Polski, Português, Română, Slovenščina, Suomi, Svenska, Türkçe, Ukrainian, Ελληνικά, русский, 한국어, 简体中文, 繁體中文, 日本語.

Welcome and good to have you here! If you’ve been working with RELUX or AGi32 switching to DIALux is easy and you won’t regret this step, promised! Of course, you will have to get used to it because DIALux, for example, works with entire buildings and is not limited to individual rooms like Relux. Of course, this seems complicated at first, but the mental leap is quickly mastered.
Also, we have a very vibrant and active community around DIALux, which you can access on Facebook, Linkedin or Instagram. At Youtube you can find our DIALux channel and many users around the world providing you with tutorials and a helping hand. If you are completely stuck and need help fast contact our support team at any time. For free, of course.
And an online course is a thousand times better than any PDF manual: A good start is our Free DIALux Basic Course in which Ariane explains a complete planning workflow in DIALux and offers you a lot of learning material such as example projects to download, so you don’t have to start from scratch and can get to know the capabilities of DIALux quickly and easily.

Yes, but you can only import interior scenes to DIALux evo created with DIALux 4 from version 4.10.0.2 onwards. Unfortunately, it is not possible to import outdoor scenes. In addition, a room-based design from DIALux 4 cannot be converted properly into a building during import. As before, it will be composed of simple objects. Likewise, calculation results may differ because DIALux 4 is working with outdated standards and calculation surfaces or value specifications may have changed.
Please note: It is necessary that DIALux 4.13 is installed on your computer. For the import to work, you need to run the 32-bit version of DIALux evo, as DIALux 4 is also a 32-bit application. Watch our short video “How to open a DIALux 4 project in DIALux evo” for instructions.

Since DIALux 12, we offer a purchase version in addition to the free version of DIALux: DIALux Pro. DIALux Pro contains special functions that enable professional users to significantly increase productivity and efficiency in their work. For example, only in DIALux Pro it is possible to import or export certain file formats (such as *.ifc, *.ppt, *.docx, *.xlsx, *.xml, *.csv). Learn more about DIALux Pro here.

Please keep in mind that you can sign up for only one 30-day trial period. If you are not sure whether you have already had a trial, please check your profile on my.dialux.com. If you’ve never had one in the past, and are still having problems signing up, please contact our support.

Please login to your account at my.dialux.com. There you can manage your licences and contracts, make or cancel subscriptions for yourself or team members.

Please login to your account at my.dialux.com. Access your licences and contracts. Here you can find all licenses assigned to you and the options to edit or cancel them separately.

It is possible to purchase multiple licenses on my.dialux.com. These can then be distributed to specific users. These users must have a verified DIALux ID.

1. Go to my.dialux.com and click on “Forgot your password?” right below the login form
2. Enter your e-mail address and click on “Continue”
3. Check your inbox for an e-mail with the subject "Reset your password at my.dialux.com" It may take some time until you receive the e-mail, please also check your spam folder
4. Click on the password reset link in the e-mail. You will be guided to my.dialux.com in your web browser
5. Enter a new password and repeat it. Click on “Save password”
6. You can now login to your account with your new password at my.dialux.com

You can purchase the Pro version directly from DIALux by clicking on a paid feature marked with the Pro banner. You will then be redirected to the purchase process on my.dialux.com. Please note: You need a DIALux ID with a confirmed email address to purchase. Here you can go directly to the purchase.

We offer you a monthly and an annual subscription. You can pay either by credit card (Mastercard, Visa, American Express) or via SEPA direct debit mandate.

Step by step instructions

1. Do you have sufficient funds for the payment method?
2. Has the card expired or been cancelled?
3. Has the card been enabled for purchases abroad, online and regular transactions? You can check these settings, for example, in the bank's mobile app or online portal.
4. Try entering your payment details in a private browser session or incognito window.
5. There may have been temporary problems with the connection. Wait a few hours and try again.
6. Contact your bank.

Some banks have single transaction limits or daily limits. Even if the funds are available, your bank may not release them. Contact your bank to have the transaction approved or to obtain information about your bank's online purchasing policies.

Step-by-step instructions

1. Did you want to pay an amount over €3,000 via SEPA? For amounts over €3,000 there are problems with the banks as the risk assessment is very high. You should choose a different payment method.
2. Is the IBAN eligible for direct debit? You can an check this on the card or ask the bank. This can be checked with the IBAN checker: https://de.iban.com/iban-checker
3. You can ask your bank whether they need to explicitly authorize the direct debit beforehand. (Mandate reference)

If payments in the customer portal with the 3D Secure system fail, you can try the following

Step-by-step instructions

1. Is 3D Secure activated on the card?
2. Are the names that have been entered identical to those on the card?
3. Are pop-up blockers active?
4. Try a different browser.

We will refund the money manually. Please contact us.

We will manually refund the money. Please contact us.

We will refund you manually. Please contact us. Since the contract has been terminated, you will have to make the purchase again.