diff --git a/lumispy/hyperspy_extension.yaml b/lumispy/hyperspy_extension.yaml
index 3d34c83f9..ca9b4b691 100644
--- a/lumispy/hyperspy_extension.yaml
+++ b/lumispy/hyperspy_extension.yaml
@@ -150,8 +150,18 @@ signals:
     lazy: True
     module: lumispy.signals.luminescence_transient
 
+  TransientSpectrumCasting:
+    signal_type: TransientSpec
+    signal_type_aliases:
+      - TRLumiSpec
+      - TR luminescence spectrum
+      - time-resolved luminescence spectrum
+    signal_dimension: 1
+    dtype: real
+    lazy: False
+    module: lumispy.signals.luminescence_transientspec
   LumiTransientSpectrum:
-    signal_type: Luminescence
+    signal_type: TransientSpec
     signal_type_aliases:
       - TRLumiSpec
       - TR luminescence spectrum
@@ -161,9 +171,8 @@ signals:
     lazy: False
     module: lumispy.signals.luminescence_transientspec
   LazyLumiTransientSpectrum:
-    signal_type: Luminescence
+    signal_type: TransientSpec
     signal_type_aliases:
-      - TransientSpec
       - TRLumiSpec
       - TR luminescence spectrum
       - time-resolved luminescence spectrum
diff --git a/lumispy/signals/__init__.py b/lumispy/signals/__init__.py
index 7f89bfcd9..010b97238 100644
--- a/lumispy/signals/__init__.py
+++ b/lumispy/signals/__init__.py
@@ -41,6 +41,7 @@
     "LazyELSpectrum",
     "LumiTransient",
     "LazyLumiTransient",
+    "TransientSpectrumCasting",
     "LumiTransientSpectrum",
     "LazyLumiTransientSpectrum",
 ]
diff --git a/lumispy/signals/luminescence_spectrum.py b/lumispy/signals/luminescence_spectrum.py
index 39fda3363..759af0abc 100644
--- a/lumispy/signals/luminescence_spectrum.py
+++ b/lumispy/signals/luminescence_spectrum.py
@@ -26,7 +26,6 @@
 from traits.api import Undefined
 
 from lumispy.signals.common_luminescence import CommonLumi
-from lumispy.signals.luminescence_transient import LumiTransient
 from lumispy import to_array, savetxt
 from lumispy.utils import solve_grating_equation
 from lumispy.utils.axes import GRATING_EQUATION_DOCSTRING_PARAMETERS
@@ -45,21 +44,8 @@ class LumiSpectrum(Signal1D, CommonLumi):
     _signal_dimension = 1
     _signal_type = "Luminescence"
 
-    def __init__(self, *args, **kwargs):
-        if hasattr(self, "axes_manager") and self.axes_manager[-1].units in [
-            "fs",
-            "ps",
-            "ns",
-            "µs",
-            "mus",
-            "ms",
-            "s",
-        ]:
-            self.metadata.Signal.signal_type = "Transient"
-            self.__class__ = LumiTransient
-            self.__init__(*args, **kwargs)
-        else:
-            super().__init__(*args, **kwargs)
+    def __init(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
 
     def remove_background_from_file(self, background=None, inplace=False, **kwargs):
         """Subtract the background to the signal in all navigation axes. If no
diff --git a/lumispy/signals/luminescence_transientspec.py b/lumispy/signals/luminescence_transientspec.py
index 08e9e4143..74d420436 100644
--- a/lumispy/signals/luminescence_transientspec.py
+++ b/lumispy/signals/luminescence_transientspec.py
@@ -21,21 +21,47 @@
 -------------------------------------------------
 """
 
-from hyperspy.signals import Signal2D
+from hyperspy.signals import Signal1D, Signal2D
 from hyperspy._signals.lazy import LazySignal
 
+from lumispy.signals import LumiSpectrum, LumiTransient
 from lumispy.signals.common_luminescence import CommonLumi
 from lumispy.signals.common_transient import CommonTransient
 
 
+class TransientSpectrumCasting(Signal1D, CommonLumi, CommonTransient):
+    """**1D signal class for casting reduced LumiTransientSpectrum to either Luminescence or Transient**"""
+
+    _signal_type = "TransientSpec"
+    _signal_dimension = 1
+
+    def __init__(self, *args, **kwargs):
+        if hasattr(self, "axes_manager") and self.axes_manager[-1].units in [
+            "fs",
+            "ps",
+            "ns",
+            "µs",
+            "mus",
+            "ms",
+            "s",
+        ]:
+            self.metadata.Signal.signal_type = "Transient"
+            self.__class__ = LumiTransient
+            self.__init__(*args, **kwargs)
+        else:
+            self.metadata.Signal.signal_type = "Luminescence"
+            self.__class__ = LumiSpectrum
+            self.__init__(*args, **kwargs)
+
+
 class LumiTransientSpectrum(Signal2D, CommonLumi, CommonTransient):
-    """**General 2D luminescence signal class (transient/time resolved)**"""
+    """**2D luminescence signal class (spectrum+transient/time resolved dimensions)**"""
 
-    _signal_type = "Luminescence"
+    _signal_type = "TransientSpec"
     _signal_dimension = 2
 
 
 class LazyLumiTransientSpectrum(LazySignal, LumiTransientSpectrum):
-    """**General lazy 2D luminescence signal class (transient/time resolved)**"""
+    """**Lazy 2D luminescence signal class (spectral+transient/time resolved dimensions)**"""
 
     _lazy = True