Use your 2nd monitor as a lightbox for video calls.
A lightweight PWA that turns any screen into an adjustable light source for video conferencing, content creation, and photography. No dependencies, no install required — just open it in your browser.
- Adjustable brightness — Fine-tune light intensity from 0-100% with a smooth slider
- Color temperature — Shift from cool (blue-white) to warm (amber) to match your environment
- Preset levels — One-click access to Low, Medium, High, and Max brightness
- Fullscreen mode — Maximize light output across your entire screen
- Keyboard shortcuts — Full keyboard control for quick adjustments
- Settings persistence — Remembers your brightness and temperature preferences
- PWA ready — Install as a standalone desktop or mobile app
- Accessible — Full keyboard navigation, ARIA labels, and screen reader support
- Zero dependencies — Pure HTML, CSS, and vanilla JavaScript
- Open bright.supply on your second monitor
- Adjust brightness and color temperature using the sliders
- Go fullscreen for maximum light output
- Position your camera to capture the light
- Look great on your next video call
| Key | Action |
|---|---|
← / → |
Decrease / increase brightness by 5% |
Space |
Toggle between current and previous brightness |
R |
Reset to defaults (75% brightness, neutral temperature) |
F |
Toggle fullscreen |
H |
Toggle help panel |
1 - 4 |
Quick presets (Low, Medium, High, Max) |
| Preset | Brightness | Best for |
|---|---|---|
| Low | 20% | Subtle fill light in dark rooms |
| Medium | 50% | Balanced, general-purpose lighting |
| High | 75% | Bright key light for calls |
| Max | 100% | Maximum brightness output |
- Video conferencing — Look better on Zoom, Teams, Meet, and WebEx
- Content creation — Better lighting for streaming, recording, and podcasting
- Photography — Softbox alternative for product photos and flat-lays
- Presentations — Eliminate shadows for interviews, webinars, and online teaching
- Pure HTML/CSS/JavaScript — No frameworks, no build step, no dependencies
- Progressive Web App — Installable on desktop and mobile, works offline
- Accessible — WCAG-friendly with full keyboard navigation and screen reader support
- Cross-platform — Works on Windows, macOS, Linux, iOS, and Android
- Lightweight — ~40KB total page weight (~15KB gzipped)
| Browser | Version | Status |
|---|---|---|
| Chrome | 60+ | Supported |
| Firefox | 55+ | Supported |
| Safari | 12+ | Supported |
| Edge | 79+ | Supported |
- Visit bright.supply
- Click the install prompt in your browser's address bar
- Launch from your desktop or app drawer
- Bookmark bright.supply
- Open on your second monitor when needed
git clone https://github.com/banastas/bright.supply.git
cd bright.supply
# No dependencies to install — just start a local server
python3 -m http.server 8000
# or
npx http-server -p 8000
# or just open index.html directly- Fork the repository
- Create a feature branch (
git checkout -b feature/your-feature) - Commit your changes
- Push to the branch
- Open a Pull Request
See CONTRIBUTING.md for detailed guidelines.
MIT License — see LICENSE for details.
- Website: bright.supply
- Email: info@bright.supply
- Issues: GitHub Issues
- Twitter: @banastas
Made by banast.as