Terra Bright
Terra Bright is a BigCommerce theme by epicShops ($300). Tested on 2026-11-07 with Google Lighthouse via PageSpeed Insights on its own demo store, it scores 63 for mobile speed and 92 for desktop speed, 85/85 for SEO and 92/88 for accessibility (mobile/desktop, 0–100).
Mobile48

Desktop98

Scores
| Mobile | Desktop | |
|---|---|---|
| Speed | 63 | 92 |
| SEO | 85 | 85 |
| Accessibility | 92 | 88 |
| Best practices | 97 | 99 |
Single preset · measured 32 times since 2026-11-07 · Lighthouse via PageSpeed Insights · 0–100, 90+ is good.
Why not 100 — Terra-Bright home page
Mobile
Speed 48 · 52 points to gain
- −25 Largest Contentful Paint medium effort
- −24 Cumulative Layout Shift medium effort
- −2.3 Speed Index medium effort
- −0.8 First Contentful Paint medium effort
- 450 ms Reduce unused CSS high effort
- 150 ms Reduce unused JavaScript high effort
SEO 85 · 15 points to gain
- −7.7 Links do not have descriptive text low effort
- −7.7 Links are not crawlable medium effort
Accessibility 91 · 9 points to gain
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
- −1.4 Heading elements are not in a sequentially-descending order medium effort
- −1.4 Document does not have a main landmark. medium effort
Best practices 96 · 4 points to gain
- −3.8 Serves images with low resolution low effort
Desktop
Speed 98 · 2 points to gain
- −2 Largest Contentful Paint medium effort
- 100 ms Reduce unused CSS high effort
SEO 85 · 15 points to gain
- −7.7 Links do not have descriptive text low effort
- −7.7 Links are not crawlable medium effort
Accessibility 86 · 14 points to gain
- −4.7 Buttons do not have an accessible name medium effort
- −3.3 Background and foreground colors do not have a sufficient contrast ratio. medium effort
- −3.3 Links do not have a discernible name medium effort
- −1.4 Heading elements are not in a sequentially-descending order medium effort
- −1.4 Document does not have a main landmark. medium effort
Presets and pages
| Preset / page | Speed | SEO | A11y | Speed | SEO | A11y | Tested |
|---|---|---|---|---|---|---|---|
| mobile | desktop | ||||||
| Terra-Bright default demo ↗ | 63 | 85 | 92 | 92 | 85 | 88 | 2026-10-31 |
| category ↗ | 82 | 85 | 92 | 98 | 85 | 88 | 2026-11-07 |
| home ↗ | 48 | 85 | 91 | 98 | 85 | 86 | 2026-10-31 |
| product ↗ | 59 | 85 | 92 | 79 | 85 | 91 | 2026-11-07 |