Complex sentence: In July 2011, Lumo Energy partnered with American Express to offer the Lumo Express product, and in September 2011, it partnered with the Velocity Frequent Flyer program to offer the Lumo Velocity product.
Split into simpler sentences: In July 2011, Lumo Energy partnered with American Express to offer the Lumo Express product. In September 2011, Lumo Energy partnered with the Velocity Frequent Flyer program to offer the Lumo Velocity product.