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Why you shouldn’t always trust manufacturer’s lumens specs

You might not be getting the brightness you think you are.

A huge focus of the AV world has been on brightness, and for good reason. Without an adequately bright image, especially in a room awash with ambient light, your displays picture will look washed out and seeing detail is difficult. With projectors, the amount of brightness it can produce will also determine how big of an image it can project.

Brightness is also one half of contrast (the other being black level), which is the most important aspect of a picture because of the way our visual system developed to survive in the world. While the amount of brightness a TV or projector produces isn’t a life or death situation (as much as we video reviewers think it might be), it’s important that we know what we’re getting from a product we’re looking to buy. Unfortunately, that isn’t always the case.

Let’s take a look at what these specs actually are, and how to make sure you’re getting the most out of them.

You’ll come across different terms as you read about brightness performance of displays — both from reviews and manufacturer specs. Our goal as reviewers is to provide you, the reader, with an accurate representation of how a product performs in the real world as opposed to what the specs say. (Specs can be useful, but it doesn’t mean they’re always entirely accurate.) So what’s the difference between a lumen, a nit, a lux, and a foot lambert?

When it comes to pure brightness capability of a projector, lumens is the important number.

When you look at different lumen measurements that projector companies might use, not all are created equal. There’s ANSI lumens, ISO lumens, CVIA lumens, LED lumens, and just plain old lumens. So which ones are the best to pay attention to?

Both ANSI lumens and ISO lumens are standardized through different organizations — the American National Standards Institute (ANSI) and the International Standard for Organization (ISO). The specific ISO standard is ISO21118. There are claims of an ability to convert one to the other (an AWOL Vision blog post points to a 1 ANSI to 0.8 ISO comparison, while an Anker Nebula post uses 1 ANSI to 1.045 ISO), but there is no official conversion. In my experience, the two are very similar, and close to a 1:1.

ANSI has been the primary standard, although many companies and websites are switching over to the ISO standard. CVIA lumens are another standard created by the China Video Industry Association, but has not caught on worldwide yet.

LED lumens are used specifically by LED projector manufacturers, but are not a standardized form of measurement. The reasoning behind those companies using the term is that the light from LEDs looks brighter to our eyes than measurement equipment. So the LED lumens number is the estimated

The lumens landscape was the wild west for a long time — and to some extent still is. Epson has spent time and money trying to fix this with lawsuits against companies that Epson claims are falsely advertising brightness output — including Anker, AWOL Vision, JmGo. So now that we have standards everything is fine and totally accurate in the projector lumen world, right? Well, not exactly.

Even with the standards, a projector can be considered within spec but still be up to 20% under the number that they publish. That means a 2,000 ANSI lumen projector could actually put out 1,600 lumens and be considered all well and good.

Add to it that the lumens numbers posted by manufacturers are almost always with the projector in its brightest mode — usually Vivid, or Dynamic, or something with a closely related synonym. The problem with these modes is that they aren’t generally color accurate, and often have a green tint to the picture. If you switch the picture mode into Movie or Cinema (which you absolutely should), you can expect a lower lumens output. Sometimes by as much as 50% of the published spec.

Taking all of that into account, having the standardized forms of measurements are still incredibly useful and worthwhile to pay attention to. Companies are more accurately reporting what their projectors are capable of and reviewers are holding them to it. Finding third parties that have done scientific measurements is a great way to check what you’re actually getting out of a projector instead of just believing what a manufacturer says. Just keep in mind that even then, what you get on your screen might not be what’s listed on the box.

Instagram is making its way to yet another screen, and this time, Apple TV is getting a taste of the Reels rabbit hole. The company has launched a dedicated Instagram app for Apple TV, bringing Reels, longer videos, and live shows to the big screen. So, if watching one quick clip on a phone somehow turns into an hour of scrolling, there's now a much larger screen for that.

Instagram brings Reels and more to Apple TV

Audio-Technica, a brand well known for making some of the best studio and professional headphones on the market, has just come out with the ATH-AWX7000, which the company itself claims to be its "finest headphones ever." The new flagship closed-back headphone has debuted at an eye-watering price of $3,799. It combines hand-finished Japanese woodwork with a newly developed 58mm driver.

The earcups are made from Kiso cypress, a prized wood historically used for Shinto shrines and Buddhist temples. Each housing is finished by hand with traditional Echizen lacquer, which brings out the grain and is expected to darken over time. The frame and sliders are finished in a deep navy kachi-iro shade traditionally associated with samurai.

This post is brought to you in paid partnership with Best Buy.

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