- Brightness is the #1 Consideration for Projector Buyers*
- Brightness is measured in Lumens
- The Best Way to Compare Projectors is to Compare Lumens
Measured with an
International Standard
ISO Lumens
- Based on Established
ISO Standard (ISO21118)
- Standardized in 1992
- Industry Accepted Method
- Used Globally for Over 20 Years
“LED Lumens”
- Not an Industry Accepted Term
- No Established Standard
- No International Acceptance
Don’t Be Misled
Beware of non-standardized methods to determine the light output
of a
projector. “LED Lumens” is not an industry accepted term. “LED Lumens”
is not based on any standard and may have been developed with the intent
to persuade or even mislead consumers. "LED Lumen” claims may also
reference the Helmholtz-Kohlrausch Effect (HK effect), for which there is
also no standard and no industry agreement on its relevance to
projector brightness measurements.
*TFCinfo Purchase Criteria Study