Fixes showers breaking lighting objects.

code/game/objects/structures/watercloset.dm

@@ -222,7 +222,7 @@
 			if(isliving(G))
 				var/mob/living/L = G
 				wash_mob(L)
-			else
+			else if(isobj(G)) // Skip the light objects
 				wash_obj(G)
 	else
 		if(isopenturf(loc))
@@ -286,7 +286,7 @@
 			wash_obj(O)
 
 
-/obj/machinery/shower/proc/wash_obj(atom/movable/O)
+/obj/machinery/shower/proc/wash_obj(obj/O)
 	. = O.clean_blood()
 	O.remove_atom_colour(WASHABLE_COLOUR_PRIORITY)
 	if(isitem(O))