Frequently Asked Questions

Screen Light Studio is a free, browser-based tool that transforms any laptop, tablet, or smartphone screen into a professional RGB light panel. It provides full color control, animation effects, brightness dimming, and color temperature adjustment — everything you need for photography and video lighting, at zero cost. No download, no install, no account required. Just open it in your browser and start.

Yes, completely free. There is no premium tier, no subscription, no hidden costs, and no in-app purchases. The entire tool is available at no charge with all features unlocked. It is designed as a free alternative to physical LED light panels that typically cost $30 to $300.

No. Screen Light Studio does not require any account, registration, or sign-in. There is no data collection, no cookies for tracking, and no server communication after the page loads. Your settings are saved only to your browser's local storage for convenience.

Screen Light Studio was created as an open-source project to provide free, professional-quality lighting tools to photographers, videographers, and content creators worldwide. It is maintained by a community of developers who believe creative tools should be accessible to everyone.

Screen Light Studio offers four color input methods: a native color picker (visual wheel), HEX code input (for copying colors from design tools), RGB sliders (Red, Green, Blue, each 0–255), and HSL sliders (Hue 0–360°, Saturation 0–100%, Lightness 0–100%). All methods are synchronized — changing one automatically updates the others.

There are 10 animation effects: Static, Slow Pulse, Fast Pulse, Fade In/Out, Rainbow Cycle, Police Red/Blue, Candle Flicker, Lightning Flash, TV Screen Glow, and Fire Effect. Each effect is designed for a specific creative purpose, from subtle ambient lighting to dramatic cinematic effects.

Yes. The brightness slider ranges from 0% (completely dark) to 100% (full intensity). Brightness is simulated by proportionally reducing all RGB values. You can also use keyboard shortcuts — Arrow Up increases brightness by 5%, Arrow Down decreases by 5%. Brightness adjustment works with both static colors and animation effects.

The color temperature slider ranges from 2000K (very warm, candle-like orange) to 10000K (very cool, blue-tinted daylight). It uses a scientifically accurate Kelvin-to-RGB conversion algorithm, so you can match your screen's light output to real-world light sources. This is essential for photography, where matching color temperature to your camera's white balance setting ensures accurate colors.

The timer offers four options: 1 minute, 5 minutes, 10 minutes, and Infinite. When a timed option is selected, a live countdown displays the remaining time. When the timer reaches zero, the screen smoothly fades to black over 2 seconds. This is useful for timed portrait sessions, hands-free operation, or creating a gradual end to a lighting setup.

The transition duration slider controls how smoothly the screen color changes when you switch colors, presets, or adjust settings. It ranges from 0 seconds (instant change) to 5 seconds (very gradual fade). Smooth transitions are important for video recording, where abrupt color changes can create jarring visual cuts.

Yes. Click the "+" button in the Favorites section to save your current color. You can store up to 20 favorite colors that persist between sessions using your browser's local storage. Click any saved color to instantly recall it. Hover over a favorite and click the × button to remove it from your collection.

Pure White Mode instantly sets the screen to #FFFFFF (pure white) at 100% brightness. It is a one-click shortcut for when you need maximum, uncolored illumination — equivalent to a standard white light panel. This is the most commonly used setting for photography fill light.

Any device with a modern web browser: laptops, desktops, tablets, and smartphones. It works on Windows, macOS, Linux, Android, iOS, and ChromeOS. The app is fully responsive and adapts its controls for both large screens and mobile devices.

Screen Light Studio works on all modern browsers including Google Chrome, Mozilla Firefox, Apple Safari, Microsoft Edge, Opera, and Brave. It uses standard web APIs (Fullscreen, Wake Lock, requestAnimationFrame, localStorage) that are supported in all current browser versions.

Yes. After you load the page for the first time, Screen Light Studio works completely offline. There are no server calls, no CDN dependencies, and no external resources. The entire application is contained within a single HTML file. You can save the file to your device and open it directly from your file manager, even in airplane mode.

There is no separate mobile app to install. Screen Light Studio is a web application that works directly in your mobile browser. Simply open it in Chrome on Android or Safari on iOS, and it works exactly like a native app. You can add it to your home screen as a Progressive Web App-style shortcut for quick access.

The Wake Lock API prevents your device's screen from turning off automatically while Screen Light Studio is active. This is critical for long photography sessions or video recordings where the screen must stay lit. If your browser supports it (Chrome, Edge), the lock activates automatically. The lock is released when you close the tab or exit fullscreen.

Yes. Screen Light Studio automatically saves your last used color, brightness, animation effect, color temperature, transition duration, and timer setting to your browser's local storage. When you reopen the page, all settings are restored exactly as you left them. Your saved favorite colors also persist between sessions.

Absolutely. Since Screen Light Studio runs in a browser, you can open it on as many devices as you want simultaneously. This is one of its biggest advantages over physical light panels — you can create multi-point lighting setups (key light, fill light, backlight) using just the devices you already own. Each device can display a different color and brightness level.

For many use cases, yes. Screen Light Studio provides color accuracy, animation effects, and fine-grained control that rivals LED panels costing $100–300. However, professional panels may offer higher luminous intensity (brightness measured in lux) and dedicated mounting hardware. For fill lighting, creative effects, product photography, and content creation, Screen Light Studio is more than sufficient and the price cannot be beat.