We took our tried-and-true, field-tested Light3, refined it significantly, optimized the entire process, and added numerous new features, all while preserving and even enhancing the user-friendly nature and high performance that Light is known for. Now, reports generated by Light4 can easily be printed, saved as PDF files, or exported as Excel (.xlsx) files in a single action for those users with "Export" permissions. The contract billing system has undergone a complete overhaul, allowing users to bill at any level of the contract—be it summary, task, or CLIN—and to modify a project's billing hierarchy whenever needed. This new version emphasizes speed, well-managed flexibility, and a variety of options such as pro-forma invoices, establishing a new benchmark for performance as well as for the preparation and distribution of invoices. Included with the software is a sample configuration tailored for government contractors, not-for-profit organizations, and various businesses, ensuring a seamless setup process. Additionally, users will appreciate the intuitive interface that supports quick adaptation to the new features, making the transition to Light4 both efficient and user-friendly.