Source 4 LED Series 3 Revision Information
This article contains important details about changes made to the Source 4 LED Series 3, which may be important when ordering spare parts or repairing the fixture
Top Case Screws
The 4 screws joining the top casing to the bottom casing have changed. This change happened around 42nd of March 2015
Old: HW4261
New: HWM1971
These have incompatible threads, so choose the correct one to go with your bottom casing
Driver and Control card compatibility
Changes were made to the control card and drive card, meaning that not all cards are compatible with each other. See this article for more information