diff --git a/src/legendoptics/data/pen_wlscomponent.dat b/src/legendoptics/data/pen_wlscomponent.dat
index e70e446..86011f5 100644
--- a/src/legendoptics/data/pen_wlscomponent.dat
+++ b/src/legendoptics/data/pen_wlscomponent.dat
@@ -1,201 +1,355 @@
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diff --git a/src/legendoptics/data/tpb_vm2000_wlscomponent.dat b/src/legendoptics/data/tpb_vm2000_wlscomponent.dat
deleted file mode 100644
index 4210c24..0000000
--- a/src/legendoptics/data/tpb_vm2000_wlscomponent.dat
+++ /dev/null
@@ -1,78 +0,0 @@
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diff --git a/src/legendoptics/data/tpb_wlsr_wlscomponent.dat b/src/legendoptics/data/tpb_wlsr_wlscomponent.dat
new file mode 100644
index 0000000..efed828
--- /dev/null
+++ b/src/legendoptics/data/tpb_wlsr_wlscomponent.dat
@@ -0,0 +1,355 @@
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diff --git a/src/legendoptics/pen.py b/src/legendoptics/pen.py
index 4ff1df8..dd0f41b 100644
--- a/src/legendoptics/pen.py
+++ b/src/legendoptics/pen.py
@@ -4,9 +4,6 @@
     for the LEGEND-200 experiment”. In: JINST 17 P09007 (2022), https://doi.org/10.1088/1748-0221/17/09/P09007
 .. [Hong2017] N. Hong et al. “Mueller matrix characterization of flexible plastic substrates”.
     In: Applied Surface Science, 421:518-528 (2017), https://doi.org/10.1016/j.apsusc.2017.01.276
-.. [Mary1997] D. Mary et al. “Understanding optical emissions from electrically stressed insulating polymers:
-    electroluminescence in poly(ethylene terephthalate) and poly(ethylene 2,6-naphthalate) films”
-    In: J. Phys. D: Appl. Phys. 30 171 (1997), https://doi.org/10.1088/0022-3727/30/2/004
 .. [Ouchi2006] I. Ouchi et al. “Features of Fluorescence Spectra of Polyethylene 2,6-Naphthalate Films”
     In: Journal of Applied Polymer Science, Vol. 105, 114-121 (2007), https://doi.org/10.1002/app.26085
 """
@@ -63,7 +60,11 @@ def pen_scint_light_yield() -> Quantity:
 
 
 def pen_wls_emission() -> tuple[Quantity, Quantity]:
-    """WLS Emission spectrum, from [Mary1997]_.
+    """WLS Emission spectrum.
+
+    [Leonhardt2024]_ measure the emission spectrum of a PEN sample made from the same pellets as
+    in LEGEMD-200 sample at an excitation wavelength of 128nm and at 87K, so exactly in our
+    experimental conditions.
 
     .. optics-plot::
     """
diff --git a/src/legendoptics/tpb.py b/src/legendoptics/tpb.py
index a8d34cf..b2c10c6 100644
--- a/src/legendoptics/tpb.py
+++ b/src/legendoptics/tpb.py
@@ -12,6 +12,9 @@
     the quantum efficiency of tetraphenyl butadiene and polyethylene naphthalate in
     liquid argon.” In: The European Physical Journal C 82.5 (May 2022).
     https://doi.org/10.1140/epjc/s10052-022-10383-0
+.. [Leonhardt2024] A. Leonhardt et al. “A novel cryogenic VUV spectrofluorometer for the
+    characterization of wavelength shifters”. In: JINST 19 C05020 (2024).
+    https://doi.org/10.1088/1748-0221/19/05/C05020
 .. [MolbaseTPB] http://www.molbase.com/en/overview_1450-63-1-moldata-77892.html
 """
 
@@ -59,14 +62,13 @@ def tpb_wls_timeconstant() -> Quantity:
 def tpb_wls_emission() -> tuple[Quantity, Quantity]:
     """WLS Emission spectrum.
 
-    [Francini2013]_ measure the emission spectrum of TPB (~160 um thick layer) on VM2000
+    [Leonhardt2024]_ measure the emission spectrum of TPB on a LEGEND-200 WLSR sample
     at an excitation wavelength of 128nm and at 87K, so exactly in our experimental
-    conditions. The major differences brougth by the LAr temperature are the vibronic
-    structures that modify the shape of the spectrum.
+    conditions.
 
     .. optics-plot::
     """
-    return readdatafile("tpb_vm2000_wlscomponent.dat")
+    return readdatafile("tpb_wlsr_wlscomponent.dat")
 
 
 def tpb_polystyrene_wls_emission() -> tuple[Quantity, Quantity]: