How to install?

Lightning will not work at local computer, only at real server with real domain name.

Important! Before using Lightning disable or remove all caching and optimization extensions/mods – if you have any. They may cause conflicts and will make total speed slower.  Lightning speeds up every aspect in more effective way then competitive extensions.

So, you have OpenCart 3 OpenCart 2 OpenCart 1.5

If you have JOURNAL theme, follow JOURNAL2 or JOURNAL3 Recommendations.