NightVision Light vs Screen Light Color

The NightVision Light is an illumination app (variable light intensity) that is best suited for operations in the dark. You can light close at hand softly with either red color light or bulb light according to your intentions. Red color light mode protects your night vision. There might be occasions that you need to confirm with a star map or check the settings of your telescope or camera in the dark with a flashlight. However, white color light of the flashlight spoils your dark-adapted eye because the pupil of your eye shrinks by it. In this reason, it is necessary to take a preventive measure against it by using a red color light of low illumination that allows for maintaining your vision in the dark. The NightVision Light app turns the screen to illumination in red color to protect your night vision. Bulb light mode prevents the reddish foreground from "star-scape" photos caused by the red color light. It is very effective to apply the red color light for operations in the dark to avoid affecting your night vision. However, amount of light received by the sensor of your camera is good enough and the red color light may cause a reddish foreground (fogging in red) in the "star-scape" night photography. To avoid this phenomenon, the bulb light model is newly applied. The intensity of the bulb light is variable.

Turn your iPhone or iPad into a clean, full-screen color light. Pick any color, adjust the brightness, then hide the controls so the display becomes the light — with nothing else in the way. Screen Light Color is useful as: → A studio light for accent or soft fill lighting → A lightbox / light table for tracing, drawing, animation, film negatives, radiographs, and more → A color reference and matching tool → A night light or screen flashlight → A red light for stargazing, night walks, or darkroom use → A beacon, visual signal, or mood light Made to stay out of your way: → Open colors from Home Screen widgets or Control Center → Use Siri and Shortcuts to open the app and set colors → Use Split View and multiple windows on iPad, each with its own color → Temporarily disable touch to prevent accidental taps or palm input → Use custom in-app screen brightness without changing your device brightness elsewhere → Navigate the app with VoiceOver Want more control? An optional in-app purchase unlocks: → Precision white-balance controls for warmer or cooler light, including magenta/green tint → Hue, saturation, brightness, RGB, and HEX controls → Saving as many custom color swatches as you want → Sync saved colors across your devices with iCloud → External-display support, so you can turn a TV or connected display into a larger light panel using AirPlay or a cable Simple when you want it. Precise when you need it.