CVIA lumens
A Chinese industry-association brightness method. It's reported to need ≥80% of the labelled value, with a test CCT window of 6,000–18,000 K plus Duv limits.
- Unit
- lm(CVIA)
- Standard
- CVIA group standard (China Electronic Video Industry Association), ~2023
- ISO 21118
- Extension
- Better
- ↑ Higher
- Status
- Standard reference being re-verified
How to compare it
CVIA lumens(lm(CVIA))
Comparable only with other CVIA figures. Never converted to ISO.
Marketing traps
- CVIA lumens: Its very wide CCT window allows a bluish white to count. Epson's position is that CVIA is not a standardised metric.
Deep cut
CVIA lumens. It's a group (T/) standard, not a national GB standard. We haven't obtained the T/CVIA number and text, so keep the 'to check' marker until we have.
Terms on this page
CVIA lumens
A Chinese group (industry association) standard, 《投影机光输出技术要求和测试方法》, from the China Electronic Video Industry Association (中国电子视像行业协会), ~April 2023. It is not a GB national standard. Reported rules: measured output ≥80% of the labelled value, measured at a white point within 6000–18000 K with Duv limits, so you can't hit the number in a green-tinted "bright" mode. JMGO announced its switch from ANSI to CVIA in March 2023. 🟡 The T/CVIA number and full text haven't been obtained (only secondary press), and Epson's position is that CVIA is not a standardised metric. Chinese-market brands cite it. ⚖ brightness.cvia_lumens ↑. We store it as its own unit and never convert it.