diff --git a/config/devices.properties b/config/devices.properties
index 86822f1..cc71840 100644
--- a/config/devices.properties
+++ b/config/devices.properties
@@ -22,5 +22,5 @@ slit1V=ch.psi.pshell.epics.Slit X10SA-OP-SV1:TRY1 X10SA-OP-SV1:TRY2
 slit2H=ch.psi.pshell.epics.Slit X10SA-OP-SH2:TRX2 X10SA-OP-SH2:TRX1
 slit2V=ch.psi.pshell.epics.Slit X10SA-OP-SV2:TRY1 X10SA-OP-SV2:TRY2
 lamp=ch.psi.pshell.epics.DiscretePositioner 
-backlight=ch.psi.pshell.epics.ControlledVariable X10SA-ES-KOI:SET-LIGHT X10SA-ES-KOI:SET-LIGHT
-frontlight=ch.psi.pshell.epics.ControlledVariable X10SA-ES-FL1:SET-LIGHT X10SA-ES-FL1:SET-LIGHT
+backlight=ch.psi.pshell.epics.ProcessVariable X10SA-ES-KOI:SET-LIGHT X10SA-ES-KOI:SET-LIGHT
+frontlight=ch.psi.pshell.epics.ProcessVariable X10SA-ES-FL1:SET-LIGHT X10SA-ES-FL1:SET-LIGHT