diff --git a/modules/services/homeassistant.nix b/modules/services/homeassistant.nix
index 7cf9de1..3f3977e 100644
--- a/modules/services/homeassistant.nix
+++ b/modules/services/homeassistant.nix
@@ -114,7 +114,7 @@ in
               lights = {
                 bathroom_light = {
                   unique_id = "87a4cbb5-e5a7-44fd-9f28-fec2d6a62538";
-                  value_template = "on";
+                  value_template = "{{ states('sensor.bathroom_motion_sensor_illuminance_lux') | int > 500 }}";
                   turn_on = { service = "script.noop"; };
                   turn_off = {
                     service = "switch.turn_on";