diff --git a/custom_components/adaptive_lighting/const.py b/custom_components/adaptive_lighting/const.py
index d2b1dc1e2..2817d5a2a 100644
--- a/custom_components/adaptive_lighting/const.py
+++ b/custom_components/adaptive_lighting/const.py
@@ -142,6 +142,30 @@
     " for later real sunsets. 🌇"
 )
 
+CONF_BRIGHTNESS_MODE, DEFAULT_BRIGHTNESS_MODE = "brightness_mode", "default"
+DOCS[CONF_BRIGHTNESS_MODE] = (
+    "Brightness mode to use. Possible values are `default`, `linear`, and `tanh` "
+    "(uses `brightness_ramp_time_before` and `brightness_ramp_time_after`). 📈"
+)
+CONF_BRIGHTNESS_RAMP_TIME_BEFORE, DEFAULT_BRIGHTNESS_RAMP_TIME_BEFORE = (
+    "brightness_ramp_time_before",
+    3600,
+)
+DOCS[CONF_BRIGHTNESS_RAMP_TIME_BEFORE] = (
+    "(Ignored if `brightness_mode='default'`) The duration (in seconds) to ramp up/down "
+    "the brightness before sunrise/sunset. The brightness starts changing at this many seconds "
+    "before the sunset/sunrise 📈📉"
+)
+CONF_BRIGHTNESS_RAMP_TIME_AFTER, DEFAULT_BRIGHTNESS_RAMP_TIME_AFTER = (
+    "brightness_ramp_time_after",
+    3600,
+)
+DOCS[CONF_BRIGHTNESS_RAMP_TIME_AFTER] = (
+    "(Ignored if `brightness_mode='default'`) The duration (in seconds) to ramp up/down "
+    "the brightness after sunrise/sunset. The brightness starts changing at this many seconds "
+    "after the sunset/sunrise 📈📉."
+)
+
 CONF_TAKE_OVER_CONTROL, DEFAULT_TAKE_OVER_CONTROL = "take_over_control", True
 DOCS[CONF_TAKE_OVER_CONTROL] = (
     "Disable Adaptive Lighting if another source calls `light.turn_on` while lights "
@@ -284,6 +308,27 @@ def int_between(min_int, max_int):
     (CONF_SUNSET_TIME, NONE_STR, str),
     (CONF_MIN_SUNSET_TIME, NONE_STR, str),
     (CONF_SUNSET_OFFSET, DEFAULT_SUNSET_OFFSET, int),
+    (
+        CONF_BRIGHTNESS_MODE,
+        DEFAULT_BRIGHTNESS_MODE,
+        selector.SelectSelector(
+            selector.SelectSelectorConfig(
+                options=["default", "linear", "tanh"],
+                multiple=False,
+                mode=selector.SelectSelectorMode.DROPDOWN,
+            ),
+        ),
+    ),
+    (
+        CONF_BRIGHTNESS_RAMP_TIME_BEFORE,
+        DEFAULT_BRIGHTNESS_RAMP_TIME_BEFORE,
+        cv.positive_int,
+    ),
+    (
+        CONF_BRIGHTNESS_RAMP_TIME_AFTER,
+        DEFAULT_BRIGHTNESS_RAMP_TIME_AFTER,
+        cv.positive_int,
+    ),
     (CONF_ONLY_ONCE, DEFAULT_ONLY_ONCE, bool),
     (CONF_TAKE_OVER_CONTROL, DEFAULT_TAKE_OVER_CONTROL, bool),
     (CONF_DETECT_NON_HA_CHANGES, DEFAULT_DETECT_NON_HA_CHANGES, bool),
@@ -322,6 +367,8 @@ def timedelta_as_int(value):
     CONF_SUNSET_OFFSET: (cv.time_period, timedelta_as_int),
     CONF_SUNSET_TIME: (cv.time, str),
     CONF_MIN_SUNSET_TIME: (cv.time, str),
+    CONF_BRIGHTNESS_RAMP_TIME_AFTER: (cv.time_period, timedelta_as_int),
+    CONF_BRIGHTNESS_RAMP_TIME_BEFORE: (cv.time_period, timedelta_as_int),
 }