diff --git a/config/devices.properties b/config/devices.properties
index 70e4d71..bb0af21 100644
--- a/config/devices.properties
+++ b/config/devices.properties
@@ -22,3 +22,4 @@ 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 
+light=ch.psi.pshell.epics.ChannelDouble "X10SA-ES-FL1:SET-LIGHT"