How bright is the screen flashlight?

The screen light fills your entire display at maximum brightness. For even more light on mobile, enable the camera LED torch which activates your phone's physical flash LED.

Does the camera LED work on my phone?

The camera LED torch works on Chrome for Android on most devices. It does NOT work on iPhone/iPad (Safari does not support the torch API) or Firefox for Android (no torch API support). If your LED doesn't turn on, the tool tells you why — try opening the page in Chrome instead. You can still use the screen light in any browser.

Can I set a timer so the light turns off automatically?

Yes. Enter any duration in minutes and seconds (from a few seconds up to many hours) or tap a quick preset (30s, 1m, 5m, 15m, 30m, 1h). The light turns off automatically when the timer runs out. Your last-used color, brightness and timer are saved so they are ready to go next time.

Will my screen stay on while using this?

Yes, the tool uses the Screen Wake Lock API to prevent your device from dimming or sleeping while the light is active.

Does it drain my battery?

A bright screen does use more battery than normal. For extended use, keep your device plugged in.

Can I use this offline?

Yes. Once the page has loaded, it works without an internet connection.

Which color is best for preserving night vision?

Red light preserves your eyes' dark-adapted state much better than white or warm light — useful for stargazing, reading a map at night, or walking around without ruining your night vision. Tap the Astronomy (red) reading preset for a one-click setup — it sets red at 15% brightness, the sweet spot for keeping your rod cells adapted.

Can I read at night without it being too bright?

Yes. The brightness slider goes down to 3% so you can use it as a dim reading light in pitch dark without blinding yourself. The Book (warm) reading preset sets a comfortable amber glow at 8% — easy on the eyes for extended reading.

Can I see the time while the light is on?

Yes. Tick the Clock checkbox and the current time appears in large faded digits in the middle of the screen while the light is on. Useful if you're reading in bed and don't want to dismiss the light just to check the clock.

Does the light fade out gently at the end of a timer?

Yes. In the last 30 seconds of a timer, the light gradually dims to off so you're not suddenly plunged into darkness. Helpful as a sleep light.

Is there a mobile app?

A native Android app is in the works — it will give you a one-tap torch without opening the browser and will keep working offline. The web version works on any device right now.

What does Candle mode do?

Candle mode fills the screen with a warm 1800 K glow and simulates the natural 5 Hz flicker of a real flame (scientifically measured — see Nature 2018 study on candle flame oscillation). It is calibrated to be perceptible without being distracting, ideal as a cozy nightlight or reading backlight. The flicker pauses at very low brightness so it is not annoying in bed.

What are Sunset, Aurora and Dawn modes?

They are ambient-gradient modes. Sunset uses long-wavelength oranges and reds that do not suppress melatonin, making it friendly for late-evening use. Aurora cycles through tranquil teal and violet. Dawn fades from deep purple to peach — useful as a slow sunrise wake-up backdrop. You can also pick any two colors yourself with the Custom gradient.

Can I use my own image as a background?

Yes. Switch to Image mode and choose an image from your device. It stays entirely on your phone or computer — it is never uploaded to any server. Great for turning your screen into a soft nightscape, a star chart for kids, or a personal mood-light photo.

在线手电筒，免费

把屏幕变成明亮的光源。手机上可启用相机 LED。

没有数据离开您的设备

按下按钮或空格键以开启

亮度 100%

颜色

定时器分钟 sec

Quick set

Reading

Mode

Clock Show time on screen while light is on

工作原理

按下电源按钮：整个屏幕会变成明亮、均匀的光源。
调节亮度：拖动亮度滑块至您满意的级别。
选择颜色：白色获得最高亮度，暖色/琥珀色提供舒适的阅读光，或选择红色以保护夜视。
进入全屏：隐藏浏览器界面以最大化照明区域。屏幕会自动保持常亮。
设置定时器：选择时长让灯光自动关闭 · 适合免持使用场景。
相机 LED（手机）：在兼容设备上启用后置 LED 闪光灯，获得更亮、更聚焦的光束。

何时使用

停电时：任意设备都可即时获得光源，无需下载应用。
在黑暗中找东西：钥匙、锁孔、掉落的小物件。
夜间阅读：使用暖琥珀色或柔和白色作为舒适的阅读灯。
露营或户外：未安装手电筒应用时也能快速获得光源。
夜视保护：红光可保持眼睛对黑暗的适应。

屏幕光 vs 相机 LED

屏幕产生大面积的漫射光 · 适合照亮房间或阅读。相机 LED 产生聚焦、更明亮的光束，类似传统手电筒。

相机 LED 兼容性：支持 Android 上的 Chrome（大多数设备）。不支持 iPhone/iPad（Safari 没有手电筒 API）、Android 版 Firefox（无手电筒 API）和桌面浏览器。工具会自动检测支持情况，并说明您的设备为何无法使用。最佳体验请在 Chrome 中打开本页。屏幕光在所有浏览器中均可使用。

在线手电筒，免费

工作原理

何时使用

屏幕光 vs 相机 LED

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