How to Use the Command 'blight' (with Examples)

Blight is a highly useful command-line utility designed to manage and manipulate the brightness of your computer display with ease. It allows users to set, show, increase, or decrease display brightness through a suite of intuitive commands. More information can be found at its GitHub repository .

Use Case 1: Set Display Brightness to 50%

Code:

blight set 50 -r

Motivation: If you’re working late at night or simply want to preserve battery life on your device, reducing the brightness to a moderate level can significantly enhance comfort and extend battery life. Setting the brightness to 50% strikes a balance between clarity and energy efficiency.

Explanation:

• blight: Invokes the blight utility.
• set: Specifies that you want to set the brightness to a particular level.
• 50: Represents the desired brightness percentage level; here, 50%.
• -r: Stands for relative, implying that the change should be applied relative to the existing brightness.

Example Output:

Brightness set to 50%

Use Case 2: Show Current Display Brightness

Code:

blight show

Motivation: Knowing the current brightness level is crucial when adjusting settings either for personal preference or based on environmental lighting. It allows users to make informed decisions about how much adjustment is needed.

Explanation:

• blight: The command-line utility for brightness control.
• show: A command to display the current brightness level on the screen.

Example Output:

Current brightness is 65%

Use Case 3: Print Maximum Display Brightness

Code:

blight max

Motivation: Determining the maximum brightness level of your display can be helpful when you are evaluating the capabilities of your device, especially when comparing with other devices or setting standard measurements for optimal performance.

Explanation:

• blight: The command-line tool for managing display brightness.
• max: This command retrieves and displays the maximum brightness level supported by your display.

Example Output:

Maximum brightness is 100%

Use Case 4: Increase Display Brightness in Percentage

Code:

blight inc number -r

Motivation: There are times when you are working in a well-lit environment or your screen might be too dim for detailed tasks. In such cases, boosting the brightness by a specific percentage can instantly enhance visibility and reading comfort.

Explanation:

• blight: Invokes the blight utility.
• inc: Short for increase, indicating an intent to raise the brightness level.
• number: This should be replaced by the percentage value by which you want to increase the brightness.
• -r: Denotes relative adjustment, which means the increase is based on the current brightness level.

Example Output:

Brightness increased by 20%, new brightness is 85%

Use Case 5: Decrease Display Brightness with Internal Units

Code:

blight dec number

Motivation: Reducing brightness using internal units is particularly useful when dealing with precision adjustments. For example, you may want to lower the brightness subtly over a period of time without making drastic changes noticeable to the eye.

Explanation:

• blight: The command utilized for altering display brightness.
• dec: Represents the decrease function for lowering the level of brightness.
• number: Stands for the number of internal units by which you wish to reduce the brightness. This is more precise than percentage-based adjustments.

Example Output:

Brightness reduced by 5 units, new brightness is 60%

Conclusion:

The blight utility offers an efficient and straightforward method for managing display brightness on your device. Whether it’s setting a precise percentage, checking the current or maximum bright levels, or making gradual adjustments, blight equips users with the control and flexibility needed for optimal display performance.