Is Ra 80 really still sufficient today?
Most buyers only focus on lumens, while lighting professionals pay more attention to CRI (Color Rendering Index). This guide explains CRI definition, Ra level differences from Ra80, Ra90 to Ra95+, and reveals hidden parameters including R9 value, spectral distribution and TM-30. Master CRI knowledge for better lighting consultation, project planning and sales.
Ordinary People Talk about Lumens, Professionals Talk about CRI CRI Ra Level Standard & Color Performance Real Business Value of CRI in Lighting Projects Why Same CRI Lighting Looks Different CRI – Core Factor of Lighting Quality & Differentiation
My experience:
For tenders, yes.
For satisfied customers – rarely.
A lot of people talk about lumens.
Professionals talk about CRI.
Essential knowledge for consulting, planning, purchasing & project business.
“Those who understand CRI advise better, sell better – and avoid complaints.”
CRI – the decisive quality factor in lighting
The Color Rendering Index (CRI) describes how natural and realistic colors appear under a light source.
It influences:
- Perception
- Product appearance
- Every visual decision within a project
The relevant CRI levels – reality instead of wishful thinking
Ra ＜ 80 → functional, but visibly dull
Ra ≥ 80 → formal minimum standard
Ra ≥ 90 → clearly improved color rendition
Ra 95+ → premium level for architecture, retail & demanding lighting design
Moving from Ra 80 to Ra 90 is not fine-tuning –
it’s a genuine shift in quality.
Why CRI has real business impact
★ Influences perception & accuracy
★ Determines the quality of consulting
★ Reduces planning errors & complaints
★ Separates price competition from real expertise
What is rarely said out loud
Two luminaires with the same CRI can look completely different.
Why?
- CRI is based on only 8 test colors (R1–R8)
- Critical colors like R9 (red) are not included
- Spectral distribution is not evaluated
True quality only becomes visible through R9 values, spectral data & TM-30 (Rf/Rg).
This is where the difference between standard and high-performance lighting becomes clear.
Bottom line – plain and simple
CRI = quality + trust + differentiation
Those who understand CRI:
★ advise better
★ sell better
★ deliver better projects
★ avoid complaints
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You’ll need this knowledge in every consultation and every product comparison.
Let’s discuss:
Where do you personally set the minimum CRI – and why?
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