Index: trunk/resources/data/validator/deprecated.mapcss
===================================================================
--- trunk/resources/data/validator/deprecated.mapcss	(revision 16752)
+++ trunk/resources/data/validator/deprecated.mapcss	(revision 16760)
@@ -2018,2 +2018,23 @@
   fixAdd: "building=apartments";
 }
+
+node[lamp_mount="bent mast"] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "lamp_mount=bent_mast";
+  group: tr("deprecated tagging");
+  fixAdd: "lamp_mount=bent_mast";
+}
+
+node[lamp_mount="straight mast"] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "lamp_mount=straight_mast";
+  group: tr("deprecated tagging");
+  fixAdd: "lamp_mount=straight_mast";
+}
+
+node[lamp_type=electrical] {
+  throwWarning: tr("{0} is deprecated", "{0.tag}");
+  suggestAlternative: "lamp_type=electric";
+  group: tr("deprecated tagging");
+  fixAdd: "lamp_type=electric";
+}
Index: trunk/resources/data/validator/ignoretags.cfg
===================================================================
--- trunk/resources/data/validator/ignoretags.cfg	(revision 16752)
+++ trunk/resources/data/validator/ignoretags.cfg	(revision 16760)
@@ -387,4 +387,18 @@
 K:manhole=plain
 ;
+; Tags which already have an own warning e.g. in deprecated.mapcss
+; to avoid a duplicate warning in severity other (#19180).
+;
+K:access=customer
+K:addr:inclusion=estimated
+K:building=apartment
+K:lamp_mount=bent mast
+K:lamp_mount=straight mast
+K:lamp_type=electrical
+K:lanes=-1
+K:lanes=-2
+K:lanes=-3
+K:lanes=-4
+;
 ; Tags not yet decided (to remove from this section when added or deprecated) 
 ; see josm tickets: 17770 15309 15774 16315 16658 16793