KnowledgeBase: Source 4 Lamps Slipping out of Sockets and/or Causing Damage to the Socket

On older Source Four's the lamp may work its way out of the socket as the fixture heats up and then cools down.  This can cause arcing and pitting of the sockets and the lamp pins, which will result in damage.  To avoid this:

Open up the endcap and verify the following.

1. Make sure that the lamp retainer spring securely grips the top of the lamp base.
2. For S4 units older than April 1997, purchase and install the lamp retainer upgrade kit. Contact your
   local ETC Dealer or ETC Technical Services for details.  <ETC Part #7060A1033>