The IVISbrite™ LL/2 Red F-luc tumor cell line (Bioware® Brite LL/2-Red-FLuc) is a light-producing cell line derived from a mouse lung carcinoma. The cells have been stably transduced with the red-shifted firefly luciferase gene from Luciola Italica (Red F-luc), for a brighter, red-shifted signal.