diff --git a/src/plugins/nightlight/constants.h b/src/plugins/nightlight/constants.h
index 65c7383a91..e32933084c 100644
--- a/src/plugins/nightlight/constants.h
+++ b/src/plugins/nightlight/constants.h
@@ -3,6 +3,7 @@
     This file is part of the KDE project.
 
     SPDX-FileCopyrightText: 2017 Roman Gilg <subdiff@gmail.com>
+    SPDX-FileCopyrightText: 2024 Vlad Zahorodnii <vlad.zahorodnii@kde.org>
 
     SPDX-License-Identifier: GPL-2.0-or-later
 */
@@ -15,7 +16,7 @@ static const int MSC_DAY = 86400000;
 static const int MIN_TEMPERATURE = 1000;
 static const int DEFAULT_DAY_TEMPERATURE = 6500;
 static const int DEFAULT_NIGHT_TEMPERATURE = 4500;
-static const int FALLBACK_SLOW_UPDATE_TIME = 1800000; /* 30 minutes */
+static const int DEFAULT_TRANSITION_DURATION = 1800000; /* 30 minutes */
 static const int MIN_TRANSITION_DURATION = 60000;
 
 }
diff --git a/src/plugins/nightlight/nightlightmanager.cpp b/src/plugins/nightlight/nightlightmanager.cpp
index 3e689b9f5e..e207590dbc 100644
--- a/src/plugins/nightlight/nightlightmanager.cpp
+++ b/src/plugins/nightlight/nightlightmanager.cpp
@@ -288,7 +288,7 @@ void NightLightManager::readConfig()
     if (maximumTransitionDuration <= transitionDuration) {
         morning = QTime(6, 0);
         evening = QTime(18, 0);
-        transitionDuration = FALLBACK_SLOW_UPDATE_TIME;
+        transitionDuration = DEFAULT_TRANSITION_DURATION;
     }
 
     m_morning = morning;
@@ -562,16 +562,16 @@ DateTimes NightLightManager::getSunTimings(const QDateTime &dateTime, double lat
     const bool endDefined = !dateTimes.second.isNull();
     if (!beginDefined || !endDefined) {
         if (beginDefined) {
-            dateTimes.second = dateTimes.first.addMSecs(FALLBACK_SLOW_UPDATE_TIME);
+            dateTimes.second = dateTimes.first.addMSecs(DEFAULT_TRANSITION_DURATION);
         } else if (endDefined) {
-            dateTimes.first = dateTimes.second.addMSecs(-FALLBACK_SLOW_UPDATE_TIME);
+            dateTimes.first = dateTimes.second.addMSecs(-DEFAULT_TRANSITION_DURATION);
         } else {
             // Just use default values for morning and evening, but the user
             // will probably deactivate Night Light anyway if he is living
             // in a region without clear sun rise and set.
             const QTime referenceTime = morning ? QTime(6, 0) : QTime(18, 0);
             dateTimes.first = QDateTime(dateTime.date(), referenceTime);
-            dateTimes.second = dateTimes.first.addMSecs(FALLBACK_SLOW_UPDATE_TIME);
+            dateTimes.second = dateTimes.first.addMSecs(DEFAULT_TRANSITION_DURATION);
         }
     }
     return dateTimes;
diff --git a/src/plugins/nightlight/nightlightmanager.h b/src/plugins/nightlight/nightlightmanager.h
index 267bfedd17..556ac75ba5 100644
--- a/src/plugins/nightlight/nightlightmanager.h
+++ b/src/plugins/nightlight/nightlightmanager.h
@@ -289,7 +289,7 @@ private:
     // manual times from config
     QTime m_morning = QTime(6, 0);
     QTime m_evening = QTime(18, 0);
-    int m_transitionDuration = FALLBACK_SLOW_UPDATE_TIME; // in milliseconds
+    int m_transitionDuration = DEFAULT_TRANSITION_DURATION; // in milliseconds
 
     // auto location provided by work space
     double m_latitudeAuto;