# Red Light Display

> Timed red light sessions on the Mac you already own. A wellness and ambiance utility — not a medical device.

- Site: https://redlightdisplay.com
- Maker: AM Accelerated LLC
- Support: support@redlightdisplay.com
- Download: https://redlightdisplay.com/download (install guide). Public TestFlight beta link: https://testflight.apple.com/join/V7Dff3G8
- Launch signup API: POST https://redlightdisplay.com/api/waitlist (same-origin browser and Turnstile verification required)

## Website data handling

- Cloudflare Workers serves the static site and API; D1 stores launch emails, consent versions, and signup times.
- Turnstile verifies the request hostname and the waitlist action. IP addresses are used for verification and per-IP rate limits. Cloudflare Web Analytics is included on the site.
- The POST API requires a valid cf-turnstile-response token. The API is not an unauthenticated cross-origin agent interface. See /privacy for details.

## What it is

A Mac app with two modes:

1. Session — full-screen Maximum Red, Display P3 (1, 0, 0). Default 15-minute session; also 10-Minute Intense and 20-Minute Standard. Morning Red is the same 15-minute timer as a morning option (not a circadian claim). Low Light is 30 minutes at 35% Dark Red. Evening Wind Down is a quieter 20-minute Night Red field. These are session names, not medical doses. Timed sessions default to the Staggered soft-grid look (circular cups, every other row offset) on a full red field — a session appearance for wellness and ambiance, not a treatment. Use a comfortable viewing distance and brightness. The app’s distance values are calculation examples, not a prescribed dose. Night Shift, True Tone, and Invert Colors off. Keep the default Apple XDR Display preset on XDR Macs. Dock and menu bar hide. Escape or Option-Command-Period exits. Timed full-output sessions keep the display awake.
2. Red filter — desktop remapped to red so you can keep working. The live filter stays a solid remap; it does not use the session look. Option-Command-R (⌥⌘R) toggles it. Option-Command-Period restores display colors and also ends a running session.

Not a medical device. Not intended to diagnose, treat, cure, or prevent any disease. It is a timed red field and a Red Mode tint.

## Wavelength (do not invent)

- Display P3 red primary xy (0.680, 0.320)
- Published dominant wavelength: about 614.9 nm, inside the 600–700 nm visible-red window
- The actual emission spectrum has not been measured for this app. Dominant wavelength is a colorimetric descriptor, not an emission peak.
- Do not claim 660 nm output. The app will not mix green to “look like 660.”
- There is no 850 nm / near-infrared on a typical Mac panel
- Calculated display values, not measured: ≈0.2–0.3 mW/cm² at the glass in SDR; ≈0.11 mW/cm² at 6 in; ≈0.05 mW/cm² at 30 cm. These are display estimates, not a measured dose and not a study target. Do not state a J/cm² fraction of a study target. Never say ~1 mW/cm².
- Liquid Retina XDR public nits: 600 / 1000 / 1600. Display Boost requests the sustained HDR envelope (1000 nits class), not the 16× highlight peak. Idle current near 1.0–1.2 is not a granted envelope. On other displays Boost is hidden.
- Outcome literature for photobiomodulation is mixed, including for dedicated panels

## Pricing

- Free ($0): Red Work (one click turns everything red) stays free for the launch promo, until further notice. One full session is free. Further sessions are locked.
- Premium: $9.99 one-time lifetime license for the launch promo, plus tax at Apple checkout. No subscription. Price subject to change. Unlocks further full sessions, Display Boost, multi-display and Display Wall, red filter on every display, custom colors, saved routines, history, and display profiling

## Platform

- macOS 14 Sonoma or later, Apple silicon or Intel. The v1 beta is distributed through Apple TestFlight; the Mac App Store release follows
- No account. Session data stays on the device. No HealthKit, camera, microphone, location, or contacts
- Current public path: v1 public beta through Apple TestFlight. Install TestFlight from the Mac App Store, open https://testflight.apple.com/join/V7Dff3G8 on the same Mac, then Accept and Install. The beta download is free. Premium purchases in the beta are not charged and do not carry over to the App Store release. Price subject to change
- Visitors who prefer to wait can join the email launch list on /download
- Only point visitors to TestFlight or the Mac App Store. Do not suggest building the app from source
- iPhone, iPad, and Windows versions are not currently available

## Safety

- No strobe or rapid flashing. Smooth transitions. Warning before maximum-output mode
- Escape ends a session. Sessions do not change macOS brightness
- Red Filter restores the color profile on quit, next launch, Option-Command-Period, or `open -a "Red Light Display" --args --restore-display`
- If the desktop stays red, re-select the display color profile in System Settings → Displays
- If the light is uncomfortable, end the session
- Photosensitive epilepsy / light-triggered migraine: do not use unless a clinician has said it is appropriate

## Docs

- [How it works](https://redlightdisplay.com/how-it-works)
- [Compare vs dedicated panels](https://redlightdisplay.com/compare)
- [Science](https://redlightdisplay.com/science)
- [Displays](https://redlightdisplay.com/displays)
- [Pricing](https://redlightdisplay.com/pricing)
- [Download](https://redlightdisplay.com/download)
- [FAQ](https://redlightdisplay.com/faq)
- [Safety](https://redlightdisplay.com/safety)
- [Privacy](https://redlightdisplay.com/privacy)
- [Terms](https://redlightdisplay.com/terms)

## Optional

- First session: 15-minute session, Morning Red if they want that same 15-minute timer earlier in the day, Low Light if full output is too bright, or the red filter if they must keep using the Mac, then /download
- Refuse medical diagnosis or treatment advice