System Turn On or Off Night Light in Windows 11


  • Staff
Night_light_banner.png

Your display emits blue light—the kind of light you see during the day—which can keep you up at night. To help you get to sleep, turn on the night light and your display will show warmer colors at night that are easier on your eyes.

The night light strength level is for the color temperature in Kelvin. You can set a strength level between 0 (6500K) to 100 (1200K) for whatever is comfortable to your eyes.

You can turn on Schedule night light. Then, either select Sunset to sunrise, or select Set hours and enter custom times for the night light to automatically turn on and off.

This tutorial will show you how to turn on or off night light for your account in Windows 11.


Night light isn't available if your device uses certain drivers (DisplayLink or Basic Display).

Night Light settings are stored in the registry keys below for the current user.

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\CloudStore\Store\DefaultAccount\Current\default$windows.data.bluelightreduction.bluelightreductionstate

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\CloudStore\Store\DefaultAccount\Current\default$windows.data.bluelightreduction.settings


The Night Light feature requires the Connected Devices Platform Service to be enabled, running, and set to automatic.



Contents






OPTION ONE

Turn On or Off Night Light in Quick Settings


1 Open Quick Settings (Win+A).

2 Click/tap on the Night light quick setting button to toggle on or off (default) for what you want. (see screenshots below)

Night_light_Quick_Settings-2.png
Night_light_Quick_Settings-1.png






OPTION TWO

Turn On or Off Night Light in Settings


1 Open Settings (Win+I).

2 Click/tap on System on the left side, and click/tap on Display on the right side. (see screenshot below)

Night_light_Settings-1.png

3 Turn On or Off (default) Night light for what you want. (see screenshot below)

Night_light_Settings-2.png

4 You can now close Settings if you like.


That's it,
Shawn Brink


 

Attachments

  • Night_light.png
    Night_light.png
    15.3 KB · Views: 74
Last edited:

FrankW

Active member
VIP
Local time
9:57 AM
Posts
171
Location
San Juan-Abra, Philippines
OS
Windows 11 22H2 build: 22621.900
@Brink
Hi Shawn
After the 22H2 updates KB5017389 preview and KB5017271 net I no longer can activate Night Light and it crashes when trying it (see attached). I deleted the reg keys you mention above without results (I put the 2 reg keys back). The issue has been reported by others on the web: Other reports on the web
I will also send a feedback to MS about this, any suggestions?
Thanks
Frank
 

Attachments

  • Crash Blue light on.txt
    2.5 KB · Views: 8

My Computer

System One

  • OS
    Windows 11 22H2 build: 22621.900
    Computer type
    Laptop
    Manufacturer/Model
    Acer/Aspire5 515-54G-70AG
    CPU
    Intel i7-10510U CPU 1.8 GHZ
    Motherboard
    Intel Comet Lake-U PCH-LP Premium
    Memory
    8 GB 1333.3 MHz Dual channel
    Graphics Card(s)
    Intel UHD + NVIDIA GeForce MX250
    Sound Card
    RealTek ALC255 chipset
    Monitor(s) Displays
    Full HD TN 16"
    Screen Resolution
    1920x1080 220 NITS
    Hard Drives
    SATA mechanical 1TB TOSHIBA HDWL110 X1UGPHELT 5600 rpm
    PSU
    Murata battery AP18C4k (31CP5/81/68) Li-Polymer Battery Pack, full capacity 46620 mWh 11.4V
    Case
    plastic with metal panel lid
    Cooling
    1 fan
    Mouse
    Precision Trackpad
    Internet Speed
    15 mb/s
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    2022 Intel diplay driver: gfx_win_101.3413_101.2111.exe

Brink

Administrator
Staff member
MVP
Thread Starter
Local time
7:57 PM
Posts
6,739
OS
Windows 11 Pro for Workstations
@Brink
Hi Shawn
After the 22H2 updates KB5017389 preview and KB5017271 net I no longer can activate Night Light and it crashes when trying it (see attached). I deleted the reg keys you mention above without results (I put the 2 reg keys back). The issue has been reported by others on the web: Other reports on the web
I will also send a feedback to MS about this, any suggestions?
Thanks
Frank

Hello Frank, :-)

It appears to be a bug in that build. Hopefully, it will get sorted in the next update.
 

My Computers

System One System Two

  • OS
    Windows 11 Pro for Workstations
    Computer type
    PC/Desktop
    Manufacturer/Model
    Custom self build
    CPU
    Intel i7-8700K 5 GHz
    Motherboard
    ASUS ROG Maximus XI Formula Z390
    Memory
    16 GB (8GBx2) G.SKILL TridentZ DDR4 3200 MHz
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 980 PRO M.2,
    1TB Samsung 970 EVO Plus M.2,
    6TB WD Black WD6001FZWX
    8TB WD MyCloudEX2Ultra NAS
    PSU
    Seasonic Prime Titanium 850W
    Case
    Thermaltake Core P3 wall mounted
    Cooling
    Corsair Hydro H115i
    Keyboard
    Logitech wireless K800
    Mouse
    Logitech MX Master 3
    Internet Speed
    1 Gbps Download and 35 Mbps Upload
    Browser
    Google Chrome
    Antivirus
    Microsoft Defender and Malwarebytes Premium
    Other Info
    Logitech Z625 speaker system,
    Logitech BRIO 4K Pro webcam,
    HP Color LaserJet Pro MFP M477fdn,
    Linksys EA9500 router,
    Motorola MB8611 cable modem,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S20 Ultra 5G phone
  • Operating System
    Windows 11 Pro for Workstations
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1
    CPU
    i7-1065G7 3.9 GHz
    Memory
    16 GB LPDDR4-3200
    Graphics card(s)
    Intel Iris Plus
    Sound Card
    Intel SST
    Monitor(s) Displays
    13.3" 4K UWVA AMOLED multitouch
    Screen Resolution
    3840 x 2160
    Hard Drives
    512 GB PCIe NVMe M.2 SSD
    Browser
    Google Chrome
    Antivirus
    Windows Defender and Malwarebytes Premium

FrankW

Active member
VIP
Local time
9:57 AM
Posts
171
Location
San Juan-Abra, Philippines
OS
Windows 11 22H2 build: 22621.900
Hello Frank, :-)

It appears to be a bug in that build. Hopefully, it will get sorted in the next update.
Thanks Shawn,
I was about to reinstall my Intel display driver debacle again but now agree that it is probably due to a bug in the last update, also getting a lot more event errors (Kernel Tracing, etc.) in 22H2 like with the W10 earlier versions, looks like we are going back in time (instead of progress) :rolleyes:
 

My Computer

System One

  • OS
    Windows 11 22H2 build: 22621.900
    Computer type
    Laptop
    Manufacturer/Model
    Acer/Aspire5 515-54G-70AG
    CPU
    Intel i7-10510U CPU 1.8 GHZ
    Motherboard
    Intel Comet Lake-U PCH-LP Premium
    Memory
    8 GB 1333.3 MHz Dual channel
    Graphics Card(s)
    Intel UHD + NVIDIA GeForce MX250
    Sound Card
    RealTek ALC255 chipset
    Monitor(s) Displays
    Full HD TN 16"
    Screen Resolution
    1920x1080 220 NITS
    Hard Drives
    SATA mechanical 1TB TOSHIBA HDWL110 X1UGPHELT 5600 rpm
    PSU
    Murata battery AP18C4k (31CP5/81/68) Li-Polymer Battery Pack, full capacity 46620 mWh 11.4V
    Case
    plastic with metal panel lid
    Cooling
    1 fan
    Mouse
    Precision Trackpad
    Internet Speed
    15 mb/s
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    2022 Intel diplay driver: gfx_win_101.3413_101.2111.exe

FrankW

Active member
VIP
Local time
9:57 AM
Posts
171
Location
San Juan-Abra, Philippines
OS
Windows 11 22H2 build: 22621.900
@Brink
Hi Shawn
I solved my Night Light crashing: Nothing to do with Windows updates, I found that I disabled Connected Devices Platform Service and that disables also (crashes) Night Light (SettingsHandlers_Display.dll). It is working now.
Frank
 

My Computer

System One

  • OS
    Windows 11 22H2 build: 22621.900
    Computer type
    Laptop
    Manufacturer/Model
    Acer/Aspire5 515-54G-70AG
    CPU
    Intel i7-10510U CPU 1.8 GHZ
    Motherboard
    Intel Comet Lake-U PCH-LP Premium
    Memory
    8 GB 1333.3 MHz Dual channel
    Graphics Card(s)
    Intel UHD + NVIDIA GeForce MX250
    Sound Card
    RealTek ALC255 chipset
    Monitor(s) Displays
    Full HD TN 16"
    Screen Resolution
    1920x1080 220 NITS
    Hard Drives
    SATA mechanical 1TB TOSHIBA HDWL110 X1UGPHELT 5600 rpm
    PSU
    Murata battery AP18C4k (31CP5/81/68) Li-Polymer Battery Pack, full capacity 46620 mWh 11.4V
    Case
    plastic with metal panel lid
    Cooling
    1 fan
    Mouse
    Precision Trackpad
    Internet Speed
    15 mb/s
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    2022 Intel diplay driver: gfx_win_101.3413_101.2111.exe
Top Bottom