diff --git a/conda-env.yml b/conda-env.yml
index f6508df..3a6fad0 100644
--- a/conda-env.yml
+++ b/conda-env.yml
@@ -1,6 +1,6 @@
 # draft conda environment file for simcmb
 
-name: deepskies-simcmb
+name: simcmb
 
 dependencies:
      - python=3.9
diff --git a/deepcmbsim/camb_power_spectrum.py b/deepcmbsim/camb_power_spectrum.py
index ca08ee2..7cef701 100644
--- a/deepcmbsim/camb_power_spectrum.py
+++ b/deepcmbsim/camb_power_spectrum.py
@@ -98,14 +98,16 @@ def get_cls(self, save_to_dict=None, user_params=True):
         # main calculation: https://camb.readthedocs.io/en/latest/camb.html#camb.get_results
         results = camb.get_results(self.CAMBparams)
 
-        outdict = { 'l': range(self.max_l_use + 1) }
+        outdict = { 'l': np.arange(self.max_l_use+1) }
         if self.UserParams['cls_to_output'] == 'all':
             cls_needed = ['clTT', 'clEE', 'clBB', 'clTE', 'clPP', 'clPT', 'clPE']
         else:
             cls_needed = self.UserParams['cls_to_output']
+            if 'clEB' in cls_needed:
+                raise ValueError('camb does NOT output EB => it cant be in cls_to_output.')
 
         # https://camb.readthedocs.io/en/latest/results.html#camb.results.CAMBdata.get_total_cls
-        if ('clTT' in cls_needed) or ('clEE' in cls_needed) or ('clEB' in cls_needed) or ('clTE' in cls_needed):
+        if ('clTT' in cls_needed) or ('clEE' in cls_needed) or ('clBB' in cls_needed) or ('clTE' in cls_needed):
             # need to run things to get one/some/all of tt, ee, bb, te
             tt, ee, bb, te = results.get_total_cls(raw_cl=self.normalize_cls, CMB_unit=self.TT_units)[:self.max_l_use + 1].T
             # add noise
@@ -144,6 +146,14 @@ def get_cls(self, save_to_dict=None, user_params=True):
                     else:
                         raise ValueError('somethings wrong.')
 
+        # see if lmin is specified - if so, discard the ells < lmin
+        if self.UserParams['lmin'] != 0:
+            ell_inds = np.where(outdict['l'] >= self.UserParams['lmin'])[0]
+            if bool(self.UserParams["verbose"]):
+                print(f'## discarding {len(outdict["l"]) - len(ell_inds)} ells given lmin specification.')
+            for key in outdict.keys():
+                outdict[key] = outdict[key][ell_inds]
+
         if bool(self.UserParams["verbose"]):
             time_end = dt.now()
             print('from', dt.strftime(time_start, '%H:%M:%S.%f %P'), 'to', dt.strftime(time_end, '%H:%M:%S.%f %P'),
diff --git a/deepcmbsim/settings/user_config.yaml b/deepcmbsim/settings/user_config.yaml
index 9fe9ecc..9c345ef 100644
--- a/deepcmbsim/settings/user_config.yaml
+++ b/deepcmbsim/settings/user_config.yaml
@@ -15,6 +15,10 @@ extra_l: 300
 max_l_use: 10000  # max_l_use will differ from max_l and max_l_tensor by "extra_l" because
 # according to the CAMB documentation errors affect the last "100 or so" multipoles
 # ---
+# decide on lmin: CAMB will still be called with lmin=0 but
+# you may specifiy lmin for the output spectra
+lmin: 0
+# ---
 # decide on what to output; either 'all' or a subset list of
 # ['clTT', 'clEE', 'clBB', 'clTE', 'clPP', 'clPT', 'clPE']
 cls_to_output: 'all'
\ No newline at end of file