Lightning includes 7 trial days right after installation without need to do any activations.
After that you will need to purchase license in order to continue using Lightning.
Lightning license costs $99 per domain and is one-time-and-forever fee.
Single license allows to use Lightning on all subdomains and multistore domains and includes all future updates.
License is purchased from Lightning widget in your admin area.
Important: License domain change is not allowed, for another domain you need to purchase another license.
Due to OpenCart Lightning 7-days free trial period, no refunds are allowed.
Please make sure that Lightning works properly and fits your needs before license purchase.