diff --git a/packages/gp8403.yaml b/packages/gp8403.yaml
index bc45b687aa44841b0940a792638fee1e200f8f46..d3fef0d243996b486d86cf1ef9e6db8c18694235 100644
--- a/packages/gp8403.yaml
+++ b/packages/gp8403.yaml
@@ -16,7 +16,13 @@ output:
     return {gp8403_ch0, gp8403_ch1};
   outputs:
     - id: gp8403_ch0
+      min_power: 0.10
+      max_power: 1.0
+      zero_means_zero: true
     - id: gp8403_ch1
+      min_power: 0.10
+      max_power: 1.0
+      zero_means_zero: true
 
 fan:
   - platform: speed
@@ -29,3 +35,4 @@ light:
     name: "Light: Level"
     output: gp8403_ch1
     default_transition_length: 0s
+    gamma_correct: 0