Privacy Policy

1. Overview and Scope

This Privacy Policy governs your use of LightBrightness.com. We provide free, public educational tools including 3D WebGL lighting simulators, photometric calculators, and camera-assisted optical lux meters.

By visiting or using any of our tools, you agree to the collection and use of information in accordance with this policy.

2. Device Camera and Hardware Sensor Access

Our Camera Lux Meter requests explicit browser permission (navigator.mediaDevices.getUserMedia) to read real-time ambient lighting. We adhere to the following principles:

• Local In-Memory Extraction: Raw video frames are rendered to a hidden HTML5 <canvas> where pixel luminance values are sampled using the CIE 1931 photopic curve.
• No Cloud Uplink: We operate no backend endpoints or APIs capable of receiving, inspecting, or storing video streams or images. All mathematics occur client-side.
• Revocable at Any Time: You may deny camera permissions or revoke them in your browser settings at any moment.

3. Information We Collect

We do not require user registration, accounts, passwords, or credit cards. We collect only the minimum technical data necessary to operate and secure the website:

4. Functional Local Storage

LightBrightness.com uses browser localStorage solely for functional preferences:

• Remembering your light or dark mode theme preference.
• Remembering your last selected room type or slider units in the 3D Simulator.
• Storing sensitivity calibration multipliers in the Camera Meter between browser sessions.
• Recording your Cookie Consent choice to avoid repeatedly displaying the banner.

You can clear your browser's local storage or cookies at any time via your browser settings without impacting core tool availability.

6. Cookie Consent Management (EU User Consent Policy & CMP)

In accordance with Google's EU User Consent Policy, GDPR, and California CPRA regulations, LightBrightness.com provides a Cookie Consent banner on your first visit. You can manage your consent preferences at any time:

• Essential Cookies: Required for core site performance, security, and theme settings (cannot be disabled).
• Advertising & Analytics Cookies: Managed via our Cookie Consent banner, permitting or declining personalized Google AdSense ads and Google Analytics measurements.
• Changing Preferences: You can reopen the Cookie Preferences modal at any time using the 'Cookie Settings' link located in our footer.

7. Google Analytics 4

We use Google Analytics 4 with IP anonymization enabled to understand site engagement, traffic volume, and popular calculator tools. GA4 collects aggregated device metadata and interaction counts without storing complete or personally identifiable IP addresses.

8. Web Fonts & Content Delivery Networks

To maintain visual readability and performance, we load typography via Google Fonts CDN. These requests are governed by Google's privacy policy. No user identifiers or tracking cookies are shared through font CDN requests.

9. Your Statutory Privacy Rights (GDPR, UK GDPR, CCPA / CPRA)

Depending on your jurisdiction (such as the European Economic Area, United Kingdom, or California), you hold the following statutory data rights:

• Right of Access: Request confirmation of whether we process personal data relating to you (such as contact correspondence).
• Right to Rectification & Erasure: Request the prompt correction or deletion of support email inquiries.
• Right to Opt Out of Sale / Sharing: We do not sell personal information. California residents may opt out of cross-context behavioral advertising through our cookie consent controls.
• Right to Non-Discrimination: You will never face reduced functionality or service penalties for exercising your privacy rights.

To exercise any of these rights, email our Data Protection contact at privacy@lightbrightness.com. privacy@lightbrightness.com.

10. Children's Privacy (COPPA)

LightBrightness.com is a general audience engineering and education website and does not knowingly collect or solicit personal information from children under the age of 13.

11. Updates to this Policy

We may periodically update this Privacy Policy to reflect advancements in our tools, updates to advertising practices, or evolving legal frameworks. Continued use of the Site after changes constitutes acceptance.