diff --git a/pollination/three_phase/three_phase/_multiply_matrix.py b/pollination/three_phase/three_phase/_multiply_matrix.py
index cd34b7b..33b9a5a 100644
--- a/pollination/three_phase/three_phase/_multiply_matrix.py
+++ b/pollination/three_phase/three_phase/_multiply_matrix.py
@@ -45,7 +45,7 @@ def multiply_threephase_matrix(
         view_matrix=view_matrix, t_matrix=t_matrix,
         daylight_matrix=daylight_matrix,
         output_format='f',
-        conversion='raw',
+        conversion='illuminance',
         header='keep'
     ):
         return [