Shunted vs. Unshunted Lampholders

March 12, 2010

Shunted Lampholders – will have 2 holes (or accept 2 wires) on the unit.

Unshunted Lampholders – will have 4 holes (or accept a total of 4 wires) on the unit.

Shunted Lampholders are to be used with Instant Start Ballasts, and Unshunted Lampholders are to be used with Rapid Start Ballasts.  An unshunted lampholder may be converted to a shunted lampholder by taking a short wire and stripping both ends. Next take one end of the wire and insert it into one hole on the left side of the lampholder, taking the other end and stick it into one of the holes on the right side of the unit.  Thus, making a jump from one side to the other, and now it becomes a shunted lampholder.

Please go to and search for your shunted or unshunted lampholder.

E260SVH120 Replacement

February 12, 2010

BC Lighting has a ballast, the BC12060 that will replace the Valmont E260SVH120, Valmont E172SVH120, Howard E2/72RS-120, Howard E1/72RS-120, PLP E260SVH120, PLP E172SVH120 ballasts.  It has the same overall dimensions and wiring.  The BC12060 ballast carries a 30 month warranty from date of manufacture.


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