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Twilight: Protect Your Sleep with Blue Light Filtering

Are you struggling to fall asleep or finding your kids hyperactive after using a tablet before bedtime? Do you use your smartphone or tablet late in the evening, or are you sensitive to light during a migraine? If so, the Twilight app could be a game-changer for you.

Twilight helps reduce the harmful effects of blue light exposure before sleep, promoting healthier sleep patterns and improving overall eye comfort. By adjusting the light emitted from your screen to match the time of day, Twilight can help you avoid disruptions to your natural circadian rhythm.

What is Twilight?

Recent studies have shown that blue light, particularly in the 460-480nm range, can interfere with your circadian rhythm by suppressing melatonin production, a hormone that regulates sleep cycles. Using smartphones or tablets for extended periods before bed can delay your sleep by up to an hour, making it harder to fall asleep at your usual time.

The Twilight app filters the blue light emitted by your device after sunset, replacing it with a soft, red light that is much gentler on your eyes. The filter’s intensity adjusts automatically based on local sunset and sunrise times, helping your eyes transition smoothly into night mode.

Key Features of Twilight

• Blue Light Filtering: Twilight filters blue light emitted by your device, reducing strain on your eyes and making it easier to fall asleep.
• Customizable Intensity: The app automatically adjusts the blue light filter based on your local time of sunset and sunrise. You can also fine-tune the filter’s intensity to suit your preferences.
• Wear OS Support: Twilight also works with Wear OS devices, syncing your phone’s filter settings with your smartwatch for a consistent experience across devices.
• AMOLED Screen Optimization: Twilight has been tested on AMOLED screens, showing no signs of screen depletion or over-burning. It reduces light emission in a balanced way, even in dark areas like the status bar, and may extend the lifespan of your AMOLED screen.
• Bed Reading Mode: Twilight is ideal for reading at night, as it reduces the screen’s brightness far beyond the controls available on most phones, providing a more comfortable reading experience.
• Smartlight Integration: If you have Philips HUE lights, you can sync Twilight with your smart lights to reduce blue light exposure in your home, enhancing the overall sleep environment.

Why Twilight Works

The app works by filtering out the blue light that stimulates Melanopsin, a photoreceptor in your eyes sensitive to blue wavelengths. Excessive exposure to this light, especially before bed, can disturb the production of Melatonin, the hormone that regulates sleep. By using Twilight, you reduce blue light exposure, thereby supporting your natural sleep-wake cycle and ensuring better sleep quality.

Scientific studies have shown the effectiveness of reducing blue light exposure in improving sleep quality:

• Melatonin and Light Exposure: Studies suggest that blue light exposure before bedtime can delay melatonin onset, shortening sleep duration.
• Circadian Rhythm Disruption: Research shows that the timing and intensity of light exposure have a significant impact on circadian rhythms and sleep quality.

Permissions and Accessibility

Twilight requires a few permissions to function properly:

• Location: To determine sunset and sunrise times based on your location.
• Running Apps: To stop Twilight in selected apps if desired.
• Write Settings: To adjust your device’s backlight for optimal filter effects.
• Network: To connect with smart light systems like Philips HUE.

The app may also request access to Accessibility Services to filter notifications and the lock screen, ensuring a consistent experience across all parts of your device. This service only uses your data to improve filtering and does not collect any personal information.

Get More from Twilight

• Automation: Twilight can be automated through Tasker or other automation apps, allowing for more precise control over when the filter is activated and adjusted.
• Scientific Backing: Twilight’s approach is supported by several studies on the effects of light exposure on circadian rhythms and melatonin production, ensuring that its features are grounded in research.

Conclusion

Twilight is the perfect solution for anyone who uses their device late at night or is sensitive to light. By filtering out harmful blue light, the app helps maintain your natural circadian rhythm, supporting better sleep quality and reducing eye strain. Whether you’re reading before bed, managing your smartphone usage, or trying to improve your sleep environment, Twilight offers a simple and effective way to enhance your nighttime routine.

Download Twilight today and experience better sleep with less strain on your eyes.