Most keyboards light up through built-in LED backlighting, controlled by a key combination or software

Whether your keyboard will light up depends on whether it has backlighting hardware installed. Most modern gaming keyboards and many laptop keyboards come with LED lights under or behind the keys. Desktop keyboards sold at standard retailers often do not. If your keyboard has this feature, you turn it on using a dedicated key (usually marked with a light icon), a function key combination, or software that came with the keyboard.

The method varies by brand and model. Some keyboards light up the moment you plug them in. Others require you to press a specific key or read driver software first. A few high-end models let you customize colors and brightness through an app. If your keyboard has no backlighting hardware, no key press or software will make it light up — you would need to replace it with a backlit model.

Key Takeaways

  • Backlighting only works if your keyboard has LED lights built in; you cannot add lighting to a keyboard that was not designed with it.
  • Most backlit keyboards turn on with a dedicated key marked with a light symbol, or by holding Fn and pressing that key.
  • Laptop keyboards usually light up through Fn + spacebar, Fn + up arrow, or Fn + down arrow, depending on the manufacturer.
  • Gaming keyboards often require you to install driver software or a companion app to control brightness and color.
  • If your keyboard does not respond to key combinations, check the manual or the manufacturer's website for your specific model number.

Check whether your keyboard has backlighting hardware

Open the manual or look up your keyboard model online to confirm it has backlighting. If you bought it as part of a laptop or desktop bundle, the spec sheet will list "backlit keyboard" or "illuminated keyboard" if the feature is present. You can also look at the keys in a dark room — if you see faint light coming from under or behind the letters, backlighting is already there.

If you cannot find the manual, search the manufacturer's website using your keyboard model number. You can usually find the model number on a sticker on the back or bottom of the keyboard. Type the model number and the word "backlit" into a search engine; if the keyboard does not have this feature, the search results will make that clear quickly.

Find the backlight key on your keyboard

Look for a key with a light bulb icon, sun icon, or lines radiating outward. This is usually on the top row of keys, often near the right side. On some keyboards it is a standalone key; on others it shares a key with another function and requires you to hold Fn (the function key) at the same time.

Press that key once. If the keyboard lights up, you are done. If nothing happens, try holding Fn and pressing the key. Some keyboards cycle through brightness levels each time you press it — press again to brighten, or press and hold to cycle faster. If the key does nothing after several presses, move to the next section.

Use function key combinations for laptops

Laptop keyboards often hide the backlight control under the Fn key. Try these combinations in order: Fn + spacebar, Fn + up arrow, Fn + down arrow, or Fn + the key with a light icon. Each manufacturer uses different combinations, so you may need to try all of them.

If one of these works, you will see the keyboard light up or a brightness indicator appear on screen. Write down which combination worked so you remember it. If none of these work, your laptop model may not have backlighting, or the feature may be controlled through system settings instead of a key.

Install software or drivers for gaming keyboards

Gaming keyboards from brands like Corsair, Razer, SteelSeries, and Logitech often require software to turn on the lights. Visit the manufacturer's website, find the support or downloads section, and search for your keyboard model. read the driver or companion app — it will usually be named something like "Corsair iCUE" or "Razer Synapse."

Install the software and plug in your keyboard (or reconnect it if it is already plugged in). Open the app and look for a lighting or effects tab. You should see options to turn the lights on, adjust brightness, and sometimes change colors. The app will save your settings, so the keyboard will remember them even after you close the software.

Check system settings if key combinations do not work

On Windows laptops, open Settings, go to System, then Display. Look for a section called "Brightness and color" or scroll down to find keyboard backlighting controls. Some Windows machines have a separate slider for keyboard brightness.

On Mac laptops, open System Preferences, click Keyboard, and look for a "Keyboard Brightness" slider. If you see it, drag it to the right to turn on the backlight. If there is no slider, your Mac model does not have backlighting.

Troubleshoot if the lights still do not turn on

If you have tried the key combinations and checked system settings with no result, the keyboard may not have backlighting, or the feature may be disabled in BIOS (the system firmware). Restart your computer and watch for a prompt to enter BIOS setup — usually it says "Press F2" or "Press Delete" during startup. Look for a setting called "Keyboard Backlighting" or "Illumination" and make sure it is set to On or Enabled.

If you still see no lights after that, your keyboard does not have backlighting hardware. You can replace it with a backlit model from any electronics retailer. Gaming keyboards with backlighting start around $30 to $50 for basic models and go up to $150 or more for keyboards with programmable keys and RGB color control.

Frequently Asked Questions

Can I add backlighting to a keyboard that does not have it?

No. Backlighting requires LED lights and wiring built into the keyboard during manufacturing. You cannot retrofit it. If your keyboard does not have backlighting, you need to buy a new one that does.

Why is my keyboard backlight not turning on even though I have the right key?

The feature may be disabled in BIOS, the battery may be low (on wireless keyboards), or the keyboard may need a driver update. Check your system settings first, then restart and enter BIOS to look for an illumination setting. If you have a wireless keyboard, try replacing the batteries.

Do all gaming keyboards have backlighting?

Most do, but not all. Check the product listing or manual before you buy. Budget gaming keyboards sometimes skip backlighting to keep the price down. The listing will say "backlit" or "RGB lighting" if the feature is included.

Will backlighting drain my laptop battery faster?

Yes, but not by much. Keyboard backlighting uses a small amount of power. If battery life is a concern, you can turn it off when you are plugged in and use it only when you need it.

What is the difference between white backlighting and RGB?

White backlighting is a single color — the lights are always white. RGB backlighting lets you change the color to red, blue, green, or any combination. RGB keyboards usually require software to control the colors. RGB costs more but gives you more customization options.