diff --git a/colour/models/rgb/transfer_functions/bt_1886.py b/colour/models/rgb/transfer_functions/bt_1886.py
index 73fb873e9..a366685f9 100644
--- a/colour/models/rgb/transfer_functions/bt_1886.py
+++ b/colour/models/rgb/transfer_functions/bt_1886.py
@@ -41,7 +41,7 @@ __all__ = ['oetf_BT1886',
            'eotf_BT1886']
 
 
-def oetf_BT1886(L, L_B=64, L_W=940):
+def oetf_BT1886(L, L_B=0, L_W=1):
     """
     Defines *Recommendation ITU-R BT.1886* opto-electrical transfer function
     (OETF / OECF).
@@ -69,7 +69,7 @@ def oetf_BT1886(L, L_B=64, L_W=940):
 
     Examples
     --------
-    >>> oetf_BT1886(277.98159179331145)  # doctest: +ELLIPSIS
+    >>> oetf_BT1886(0.11699185725296059)  # doctest: +ELLIPSIS
     0.4090077...
     """
 
@@ -92,7 +92,7 @@ def oetf_BT1886(L, L_B=64, L_W=940):
     return V
 
 
-def eotf_BT1886(V, L_B=64, L_W=940):
+def eotf_BT1886(V, L_B=0, L_W=1):
     """
     Defines *Recommendation ITU-R BT.1886* electro-optical transfer function
     (EOTF / EOCF).
@@ -118,7 +118,7 @@ def eotf_BT1886(V, L_B=64, L_W=940):
     Examples
     --------
     >>> eotf_BT1886(0.409007728864150)  # doctest: +ELLIPSIS
-    277.9815917...
+    0.1169918...
     """
 
     V = np.asarray(V)

Change "L_B" and "L_W" default argument values for "BT.1886" eotf.
Current default values are 64 and 940, i.e. 10-bit black and white code values. L_B and L_W should be screen luminance in cd/m^2 if the function is to return absolute luminance, or e.g. 0 and 1 to return normalised values.
diff --git a/colour/models/rgb/transfer_functions/tests/tests_bt_1886.py b/colour/models/rgb/transfer_functions/tests/tests_bt_1886.py
index b9254dd3a..d259abb97 100644
--- a/colour/models/rgb/transfer_functions/tests/tests_bt_1886.py
+++ b/colour/models/rgb/transfer_functions/tests/tests_bt_1886.py
@@ -38,18 +38,18 @@ oetf_BT1886` definition.
         """
 
         self.assertAlmostEqual(
-            oetf_BT1886(64.0),
+            oetf_BT1886(0.0),
             0.0,
             places=7)
 
         self.assertAlmostEqual(
-            oetf_BT1886(184.32),
-            0.268401363726554,
+            oetf_BT1886(0.016317514686316),
+            0.18,
             places=7)
 
         self.assertAlmostEqual(
-            oetf_BT1886(940),
-            1.000000000000000,
+            oetf_BT1886(1.0),
+            1.0,
             places=7)
 
     def test_n_dimensional_oetf_BT1886(self):
@@ -58,8 +58,8 @@ oetf_BT1886` definition.
 oetf_BT1886` definition n-dimensional arrays support.
         """
 
-        L = 184.32
-        V = 0.268401363726554
+        L = 0.016317514686316
+        V = 0.18
         np.testing.assert_almost_equal(
             oetf_BT1886(L),
             V,
@@ -111,17 +111,17 @@ eotf_BT1886` definition.
 
         self.assertAlmostEqual(
             eotf_BT1886(0.0),
-            64.0,
+            0.0,
             places=7)
 
         self.assertAlmostEqual(
             eotf_BT1886(0.18),
-            136.58617957,
+            0.016317514686316,
             places=7)
 
         self.assertAlmostEqual(
             eotf_BT1886(1.0),
-            940.00000000,
+            1.0,
             places=7)
 
     def test_n_dimensional_eotf_BT1886(self):
@@ -131,7 +131,7 @@ eotf_BT1886` definition n-dimensional arrays support.
         """
 
         V = 0.18
-        L = 136.58617957
+        L = 0.016317514686316
         np.testing.assert_almost_equal(
             eotf_BT1886(V),
             L,

pip install -e .[tests]
parse_log_pytest
requirements.txt
pytest pytest-cov pytest-xdist pytest-mock pytest-asyncio
apt-get update apt-get install -y gcc
3.5
requirements/base.txt
pytest --no-header -rA --tb=line --color=no -p no:cacheprovider -W ignore::DeprecationWarning
attrs==22.2.0
certifi==2021.5.30
-e git+https://github.com/colour-science/colour.git@c8d6d39746fc04f65306acfabe636d81229965cd#egg=colour_science
coverage==6.2
execnet==1.9.0
flake8==5.0.4
importlib-metadata==4.2.0
iniconfig==1.1.1
mccabe==0.7.0
nose==1.3.7
numpy==1.19.5
packaging==21.3
pluggy==1.0.0
py==1.11.0
pycodestyle==2.9.1
pyflakes==2.5.0
pyparsing==3.1.4
pytest==7.0.1
pytest-asyncio==0.16.0
pytest-cov==4.0.0
pytest-mock==3.6.1
pytest-xdist==3.0.2
scipy==1.5.4
six==1.17.0
tomli==1.2.3
typing_extensions==4.1.1
zipp==3.6.0

name: colour
channels:
  - defaults
  - https://repo.anaconda.com/pkgs/main
  - https://repo.anaconda.com/pkgs/r
  - conda-forge
dependencies:
  - _libgcc_mutex=0.1=main
  - _openmp_mutex=5.1=1_gnu
  - ca-certificates=2025.2.25=h06a4308_0
  - certifi=2021.5.30=py36h06a4308_0
  - ld_impl_linux-64=2.40=h12ee557_0
  - libffi=3.3=he6710b0_2
  - libgcc-ng=11.2.0=h1234567_1
  - libgomp=11.2.0=h1234567_1
  - libstdcxx-ng=11.2.0=h1234567_1
  - ncurses=6.4=h6a678d5_0
  - openssl=1.1.1w=h7f8727e_0
  - pip=21.2.2=py36h06a4308_0
  - python=3.6.13=h12debd9_1
  - readline=8.2=h5eee18b_0
  - setuptools=58.0.4=py36h06a4308_0
  - sqlite=3.45.3=h5eee18b_0
  - tk=8.6.14=h39e8969_0
  - wheel=0.37.1=pyhd3eb1b0_0
  - xz=5.6.4=h5eee18b_1
  - zlib=1.2.13=h5eee18b_1
  - pip:
      - attrs==22.2.0
      - coverage==6.2
      - execnet==1.9.0
      - flake8==5.0.4
      - importlib-metadata==4.2.0
      - iniconfig==1.1.1
      - mccabe==0.7.0
      - nose==1.3.7
      - numpy==1.19.5
      - packaging==21.3
      - pluggy==1.0.0
      - py==1.11.0
      - pycodestyle==2.9.1
      - pyflakes==2.5.0
      - pyparsing==3.1.4
      - pytest==7.0.1
      - pytest-asyncio==0.16.0
      - pytest-cov==4.0.0
      - pytest-mock==3.6.1
      - pytest-xdist==3.0.2
      - scipy==1.5.4
      - six==1.17.0
      - tomli==1.2.3
      - typing-extensions==4.1.1
      - zipp==3.6.0
prefix: /opt/conda/envs/colour

colour/models/rgb/transfer_functions/tests/tests_bt_1886.py::TestOetf_BT1886::test_n_dimensional_oetf_BT1886 colour/models/rgb/transfer_functions/tests/tests_bt_1886.py::TestOetf_BT1886::test_oetf_BT1886 colour/models/rgb/transfer_functions/tests/tests_bt_1886.py::TestEotf_BT1886::test_eotf_BT1886 colour/models/rgb/transfer_functions/tests/tests_bt_1886.py::TestEotf_BT1886::test_n_dimensional_eotf_BT1886
colour/models/rgb/transfer_functions/tests/tests_bt_1886.py::TestOetf_BT1886::test_nan_oetf_BT1886 colour/models/rgb/transfer_functions/tests/tests_bt_1886.py::TestEotf_BT1886::test_nan_eotf_BT1886
colour/models/rgb/transfer_functions/bt_1886.py
colour/models/rgb/transfer_functions/bt_1886.py