Monitoring

Lighthouse Reports

Run and interpret Lighthouse audits for performance, accessibility, and SEO.

Updated 2026-03-10

2 min read

lighthouse

audit

performance

Lighthouse Reports#

What Is Lighthouse?#

Google Lighthouse is an automated auditing tool that evaluates web pages across multiple categories. LemWatch runs Lighthouse audits on both mobile and desktop viewports with every site check.

Categories Tested#

Category	What's measured
Performance	Core Web Vitals, load times, render-blocking resources
Accessibility	ARIA labels, contrast ratios, keyboard navigation
Best Practices	HTTPS, console errors, deprecated APIs
SEO	Meta tags, crawlability, mobile-friendly design

Viewing Results#

Navigate to your site's detail page

Click the Performance tab

View mobile and desktop scores side-by-side

Click "View Full Report" for the detailed Lighthouse breakdown

Understanding Scores#

90–100 🟢 — Good. Your page performs well

50–89 🟡 — Needs improvement. Review the specific audit failures

0–49 🔴 — Poor. Significant issues need fixing

Mobile vs Desktop#

LemWatch runs separate Lighthouse audits for mobile and desktop:

Mobile — Simulates a mid-range phone on a 4G connection

Desktop — Simulates a standard desktop on a broadband connection

Mobile scores are typically lower due to simulated throttling.

Trend Tracking#

View score trends over 7, 30, and 90 days on the Performance tab. Spot regressions caused by deployments or third-party script changes.

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Priority Dashboard

Money Pages

Core Web Vitals Explained

Understanding LCP, CLS, INP and how to improve them.

Setting Performance Budgets

Set thresholds and get alerted when metrics exceed your limits.

Using the Insights Page

Understand the AI-powered insights and recommendations for your sites.