Black Light

Developer: Michel Fortin

Current Version: 2.3.2

Last Updated: 12 months ago

Download Size: 1 MB - Download


With Black Light you can apply a combination of visual effects to your screen by manipulating the gamma curve. Opening Black Light will automatically apply the selected effects. Quitting the application will restore the original settings.

You can toggle the selected effect combination by clicking on the Black Light icon in the dock, by using a global hotkey, or through the optional Black Light menu icon that can appear on the right side of the menu bar. (Note: this last option is only available with OS X 10.7 or later.)

- Invert Screen
Reverse blacks and whites, giving you a negative of the image on your screen.

- Overexposure
Replace white grays with white to remove stripes, making white the background of most windows. Lighter colors might change hue slightly.

- HDTV Luminance Adjustment
Adapt image for the 16–235 luminance range used by some high-definition television sets when connected by HDMI. Normally, your computer should be capable of automatically adjusting output values accordingly, but this isn't always possible when the TV is connected through an adapter.

- Dim Screen
Reduce screen luminosity by dimming each pixel. Useful to reduce the luminosity of LCD screens beyond the minimal value of the back light.

- Color Filter
Simulation of a color filter put in front of the screen. Lets you change the tint by setting the white point.

Compatibility note: Black Light works great with Night Shift, but cannot run simultaneously with the app f.lux.


Release Notes:

• Fixed a crach that would occur in 2.3.1 when running on macOS 10.8 and earlier.


Most Helpful Reviews

Version 1.8.1
Review by Nate

If you work at night, you’ll like this - This is a great app for working in the dark. A red monochrome filter is easy on the eyes and preserves your night vision. There are several apps that can darken your screen or apply a red filter, but to do it right, you need to apply a red filter AND invert the screen, which this app does. The only thing that would make it better is if it had the option to clear your wallpaper when it activates. For example, when you are using inverted colors, it could replace the background with white, which when inverted appears black. This would reduce the amount of light even further.

Found helpful by 4 out of 4 people

More Reviews for Current Version

Version 2.3.2
Review by disappointed2984

NO LONGER WORKS!!! - I loved this App but seems to have stopped working I woudl use to only invert one screen but now this just stopped working

Found helpful by 1 out of 1 people