C
Evidence Grade C
Use with Hedging
Current
87%
87% -- email deliverability for Firstsales.io (2026)
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
87%
Unit
Percentage
Data Vintage
2026
Entity
Evidence Quality
C
Moderate quality evidence
Useful directional data with some methodological gaps. Treat as indicative rather than definitive -- corroborate before citing in formal research.
Single source - not yet corroborated
Score breakdown
Extraction
95
Source Trust
50
Citation Chain
90
Independence
30
Methodology
45
Freshness
95
Sources (5)
firstsales.io
Primary
Tier A
https://firstsales.io/sales-guide/eyewear-store-sales-management/ ↗
Source Article
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Also cited by
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Original Research
firstsales.io
· Original study ↗
Methodology
Comparison to industry average
Methodology documented
Segmentation
Channelrss_feed
Cite this stat
Suggested hedging: According to limited, single-source data, based on claims without stated methodology, with unverified sample sizes...
Plain Text
Firstsales.io: 87% email deliverability. Source: firstsales.io (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/eyewear-store-sales-management-email-deliverability
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<blockquote cite="https://lighthousedata.io/data/eyewear-store-sales-management-email-deliverability" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>87%</strong> -- email deliverability for Firstsales.io<br><small>Source: firstsales.io (2026) · <a href="https://lighthousedata.io/data/eyewear-store-sales-management-email-deliverability" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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