How to access the customer area? Lumisa 31/01/2021 Lumisa Bills 5 Once your first invoice with Lumisa has been issued, register in the Customer Area to enjoy all your benefits. You will have at your disposal all the exclusive services: Check your invoices and download them in PDF format whenever you want from your home. Make changes of holder or power/plan in a simple and fast way. It is completely free, you just have to register. STEP 1 Enter Lumisa's website and fill in the information required for registration. STEP 2 Enter your email inbox and activate your account. STEP 3 After activating your account, go back to the Lumisa website, log in and you can now check all your electricity bills wherever and whenever you want. You can change the password in the Personal Data section.