diff --git a/tardis/widgets/sdec_plot.py b/tardis/widgets/sdec_plot.py
index f806f1d0303..5dc75e56ca8 100644
--- a/tardis/widgets/sdec_plot.py
+++ b/tardis/widgets/sdec_plot.py
@@ -441,7 +441,7 @@ def _calculate_plotting_data(
             [lower_lambda, upper_lambda] * u.AA
         distance : astropy.Quantity
             Distance used to calculate flux instead of luminosities in the plot.
-            Preferrably having units of cm.
+            It should have a length unit like m, Mpc, etc.
 
         Notes
         -----
@@ -502,7 +502,14 @@ def _calculate_plotting_data(
         if distance is None:
             self.lum_to_flux = 1  # so that this term will have no effect
         else:
-            self.lum_to_flux = 4.0 * np.pi * (distance.to("cm")) ** 2
+            if distance <= 0:
+                raise ValueError(
+                    "distance passed must be greater than 0. If you intended "
+                    "to plot luminosities instead of flux, set distance=None "
+                    "or don't specify distance parameter in the function call."
+                )
+            else:
+                self.lum_to_flux = 4.0 * np.pi * (distance.to("cm")) ** 2
 
         # Calculate luminosities to be shown in plot
         (
@@ -660,6 +667,7 @@ def _calculate_emission_luminosities(self, packets_mode, packet_wvl_range):
                 group["nus"],
                 bins=self.plot_frequency_bins,
                 weights=group["energies"]
+                / self.lum_to_flux
                 / self.data[packets_mode].time_of_simulation,
             )
 
@@ -736,6 +744,7 @@ def _calculate_absorption_luminosities(
                 group["last_line_interaction_in_nu"],
                 bins=self.plot_frequency_bins,
                 weights=group["energies"]
+                / self.lum_to_flux
                 / self.data[packets_mode].time_of_simulation,
             )
 
@@ -805,7 +814,7 @@ def generate_plot_mpl(
             [lower_lambda, upper_lambda] * u.AA. Default value is None
         distance : astropy.Quantity or None, optional
             Distance used to calculate flux instead of luminosities in the plot.
-            Preferrably having units of cm. Default value is None
+            It should have a length unit like m, Mpc, etc. Default value is None
         show_modeled_spectrum : bool, optional
             Whether to show modeled spectrum in SDEC Plot. Default value is
             True
@@ -867,7 +876,7 @@ def generate_plot_mpl(
         self.ax.set_xlabel(r"Wavelength $[\AA]$", fontsize=12)
         if distance:  # Set y-axis label for flux
             self.ax.set_ylabel(
-                r"$F_{\lambda}$ [erg/s/$\AA/cm^{2}$]", fontsize=12
+                r"$F_{\lambda}$ [erg/s/cm^{2}/$\AA$]", fontsize=12
             )
         else:  # Set y-axis label for luminosity
             self.ax.set_ylabel(r"$L_{\lambda}$ [erg/s/$\AA$]", fontsize=12)
@@ -994,7 +1003,7 @@ def generate_plot_ply(
             [lower_lambda, upper_lambda] * u.AA. Default value is None
         distance : astropy.Quantity or None, optional
             Distance used to calculate flux instead of luminosities in the plot.
-            Preferrably having units of cm. Default value is None
+            It should have a length unit like m, Mpc, etc. Default value is None
         show_modeled_spectrum : bool, optional
             Whether to show modeled spectrum in SDEC Plot. Default value is
             True