The UV Dynamics Ballast 400156 is designed to run Lamps 400128 and 400158 (R1245) but can also run Lamp 400152 (but power will be under utilized since it is designed to run a larger lamp).
MF-LL120 UV Dynamics Ballast for UVD400, UVD485, UVD600 Part #400156 This is a Genuine UV Dynamics replacement part. This ballast has a 4 pin white lamp harness with locking bolt. It comes with a grounding wire for connection to UV chamber. It includes the power cord. This ballast uses true lamp current detection.