Surfe credits and Lighthouse credits are totally different. This means that you will not be able to use your Surfe credits with Lighthouse at the moment.
You can purchase your Lighthouse credits in advance from your Lighthouse Homepage-> Buy Credits.
Or after uploading the CSV and completing column mapping. Depending on your enrichment, we can charge you from 1 credit (emails) up to 3 credits (email + mobile). Credits are deducted only if we find valid contact details.