System Turn On or Off Night Light in Windows 11


  • Staff
Night_light_banner.png

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

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.


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: 137
Last edited:
@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: 70

My Computers

System One System Two

  • OS
    Windows 11 Home 22H2 build: 22621.1928
    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, firmware version 3.2
    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
    Polycarbonate with a metal panel lid
    Cooling
    1 fan
    Keyboard
    US
    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
  • Operating System
    Windows 11 Home 23H2 build 22631.3447
    Computer type
    Laptop
    Manufacturer/Model
    Asus Vivobook K3502Z S15 15" OLED
    CPU
    Intel 12th Gen. i7 12700H, 14 cores, 2.3 GHz (24M Cache, up to 4.7 GHz, 6P+8E cores)
    Motherboard
    Alder Lake-H, 1700-4700 MHz clock rate
    Memory
    8GB LPDDR4 on board + 8GB LPDDR4 3200 MHz in Dual Channel.
    Graphics card(s)
    Intel Iris Xe supports up to 4096 x 2304 @ 120Hz
    Sound Card
    Harman Kardon - DTS
    Monitor(s) Displays
    OLED 15.6inch 2.8K (2880 x 1620)
    Screen Resolution
    16:9 aspect ratio 0.2ms response time 120Hz refresh rate, 550nits
    Hard Drives
    512GB M.2 NVMe Gen4 PCIe 4.0 SSD, Micron_2450_MTFDKBA512TFK
    PSU
    90-Watt USB charger (Thunderbolt4)
    Case
    Metal lid, plastic case
    Cooling
    1 fan
    Mouse
    Precision Trackpad
    Keyboard
    With backlight
    Internet Speed
    ISP provides 15 mb/s WIFI LTE (4G), laptop WIFI 6 adapter.
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    BIOS American Megatrends International, LLC. K3502ZA.307, 08/09/2022. Network adapter: Intel Wi-Fi 6E AX211 160 MHz
@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
    64 GB (4x16GB) G.SKILL TridentZ RGB DDR4 3600 MHz (F4-3600C18D-32GTZR)
    Graphics Card(s)
    ASUS ROG-STRIX-GTX1080TI-O11G-GAMING (11GB GDDR5X)
    Sound Card
    Integrated Digital Audio (S/PDIF)
    Monitor(s) Displays
    2 x Samsung Odyssey G75 27"
    Screen Resolution
    2560x1440
    Hard Drives
    1TB Samsung 990 PRO M.2,
    4TB Samsung 990 PRO M.2,
    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,
    APC SMART-UPS RT 1000 XL - SURT1000XLI,
    Galaxy S23 Plus phone
  • Operating System
    Windows 11 Pro
    Computer type
    Laptop
    Manufacturer/Model
    HP Spectre x360 2in1 14-eu0098nr (2024)
    CPU
    Intel Core Ultra 7 155H 4.8 GHz
    Memory
    16 GB LPDDR5x-7467 MHz
    Graphics card(s)
    Integrated Intel Arc
    Sound Card
    Poly Studio
    Monitor(s) Displays
    14" 2.8K OLED multitouch
    Screen Resolution
    2880 x 1800
    Hard Drives
    2 TB PCIe NVMe M.2 SSD
    Internet Speed
    Intel Wi-Fi 7 BE200 (2x2) and Bluetooth 5.4
    Browser
    Chrome and Edge
    Antivirus
    Windows Defender and Malwarebytes Premium
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 Computers

System One System Two

  • OS
    Windows 11 Home 22H2 build: 22621.1928
    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, firmware version 3.2
    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
    Polycarbonate with a metal panel lid
    Cooling
    1 fan
    Keyboard
    US
    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
  • Operating System
    Windows 11 Home 23H2 build 22631.3447
    Computer type
    Laptop
    Manufacturer/Model
    Asus Vivobook K3502Z S15 15" OLED
    CPU
    Intel 12th Gen. i7 12700H, 14 cores, 2.3 GHz (24M Cache, up to 4.7 GHz, 6P+8E cores)
    Motherboard
    Alder Lake-H, 1700-4700 MHz clock rate
    Memory
    8GB LPDDR4 on board + 8GB LPDDR4 3200 MHz in Dual Channel.
    Graphics card(s)
    Intel Iris Xe supports up to 4096 x 2304 @ 120Hz
    Sound Card
    Harman Kardon - DTS
    Monitor(s) Displays
    OLED 15.6inch 2.8K (2880 x 1620)
    Screen Resolution
    16:9 aspect ratio 0.2ms response time 120Hz refresh rate, 550nits
    Hard Drives
    512GB M.2 NVMe Gen4 PCIe 4.0 SSD, Micron_2450_MTFDKBA512TFK
    PSU
    90-Watt USB charger (Thunderbolt4)
    Case
    Metal lid, plastic case
    Cooling
    1 fan
    Mouse
    Precision Trackpad
    Keyboard
    With backlight
    Internet Speed
    ISP provides 15 mb/s WIFI LTE (4G), laptop WIFI 6 adapter.
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    BIOS American Megatrends International, LLC. K3502ZA.307, 08/09/2022. Network adapter: Intel Wi-Fi 6E AX211 160 MHz
@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 Computers

System One System Two

  • OS
    Windows 11 Home 22H2 build: 22621.1928
    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, firmware version 3.2
    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
    Polycarbonate with a metal panel lid
    Cooling
    1 fan
    Keyboard
    US
    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
  • Operating System
    Windows 11 Home 23H2 build 22631.3447
    Computer type
    Laptop
    Manufacturer/Model
    Asus Vivobook K3502Z S15 15" OLED
    CPU
    Intel 12th Gen. i7 12700H, 14 cores, 2.3 GHz (24M Cache, up to 4.7 GHz, 6P+8E cores)
    Motherboard
    Alder Lake-H, 1700-4700 MHz clock rate
    Memory
    8GB LPDDR4 on board + 8GB LPDDR4 3200 MHz in Dual Channel.
    Graphics card(s)
    Intel Iris Xe supports up to 4096 x 2304 @ 120Hz
    Sound Card
    Harman Kardon - DTS
    Monitor(s) Displays
    OLED 15.6inch 2.8K (2880 x 1620)
    Screen Resolution
    16:9 aspect ratio 0.2ms response time 120Hz refresh rate, 550nits
    Hard Drives
    512GB M.2 NVMe Gen4 PCIe 4.0 SSD, Micron_2450_MTFDKBA512TFK
    PSU
    90-Watt USB charger (Thunderbolt4)
    Case
    Metal lid, plastic case
    Cooling
    1 fan
    Mouse
    Precision Trackpad
    Keyboard
    With backlight
    Internet Speed
    ISP provides 15 mb/s WIFI LTE (4G), laptop WIFI 6 adapter.
    Browser
    Edge
    Antivirus
    Windows Defender
    Other Info
    BIOS American Megatrends International, LLC. K3502ZA.307, 08/09/2022. Network adapter: Intel Wi-Fi 6E AX211 160 MHz
Back
Top Bottom