diff --git a/iohub/ngff/nodes.py b/iohub/ngff/nodes.py
index 8089a21..f05adbc 100644
--- a/iohub/ngff/nodes.py
+++ b/iohub/ngff/nodes.py
@@ -1060,7 +1060,7 @@ def get_effective_scale(
             if transform.type == "scale":
                 full_scale *= np.array(transform.scale)
 
-        return list(full_scale)
+        return [float(x) for x in full_scale]
 
     def get_effective_translation(
         self,
@@ -1087,7 +1087,7 @@ def get_effective_translation(
             if transform.type == "translation":
                 full_translation += np.array(transform.translation)
 
-        return list(full_translation)
+        return [float(x) for x in full_translation]
 
     def set_transform(
         self,
diff --git a/tests/ngff/test_ngff.py b/tests/ngff/test_ngff.py
index a9705f0..837c4dd 100644
--- a/tests/ngff/test_ngff.py
+++ b/tests/ngff/test_ngff.py
@@ -512,16 +512,16 @@ def test_set_transform_image(ch_shape_dtype, arr_name):
     ),
 ]
 target_scales = [
-    (1.0, 1.0, 1.0, 1.0, 1.0),
-    (1.0, 2.0, 3.0, 4.0, 5.0),
-    (1.0, 1.0, 1.0, 1.0, 1.0),
-    (4.0, 4.0, 4.0, 4.0, 4.0),
+    [1.0, 1.0, 1.0, 1.0, 1.0],
+    [1.0, 2.0, 3.0, 4.0, 5.0],
+    [1.0, 1.0, 1.0, 1.0, 1.0],
+    [4.0, 4.0, 4.0, 4.0, 4.0],
 ]
 target_translations = [
-    (0.0, 0.0, 0.0, 0.0, 0.0),
-    (0.0, 0.0, 0.0, 0.0, 0.0),
-    (1.0, 2.0, 3.0, 4.0, 5.0),
-    (2.0, 2.0, 2.0, 2.0, 2.0),
+    [0.0, 0.0, 0.0, 0.0, 0.0],
+    [0.0, 0.0, 0.0, 0.0, 0.0],
+    [1.0, 2.0, 3.0, 4.0, 5.0],
+    [2.0, 2.0, 2.0, 2.0, 2.0],
 ]