What are Lumens?

Technically speaking, a lumen is, “a unit of luminous flux in the International System of Units, that is equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions.”

Simply put, lumens are brightness. The higher the lumen output, the brighter the image will be displayed. Not to be confused with wattage, which measures the energy consumption of the lamp, lumens measure the actual light output. A 100-watt incandescent (old type) lightbulb has 1,600 lumens. The lumen amount is a really important factor to consider when purchasing a new projector, or when keeping up with your current projector. 

The setting in which you intend to use your projector will make a big difference in the amount of brightness you will need. Rooms that have more ambient light, (light that is already present in a scene before any additional lighting is added), like classrooms, living rooms, and businesses, require a higher output than rooms that are dark, such as home cinemas, to display the same quality images. When it comes to buying a projector, more lumens do not always mean better.

 Ambient light and screen size are both important to consider when deciding how many lumens are right for you. Also keep in mind that getting the right projector will usually not be an exact science. An average home projector is somewhere under 3,000 ANSI lumens, which can easily display an 80” picture. All you need to know is a good estimate of what you will need. In order to avoid overpaying for unnecessary lumens, it’s important to note that small differences in light output will be virtually undetectable to the human eye.

For example, a projector like the Epson TW10H which has 1,200 lumens, compared to an Epson TW200H with 1,300 in the same lighting, will not look any different. However, the 1,200 lumens compared to something like an Epson Powerlite 74C with 2,000 lumens will display a noticeably different amount of brightness. In terms of screen size, the larger the screen you need to project on, the more light output you will need.

Here is a simple calculation you can go by.  There should be at least 80 lumens of brightness per square-foot of screen surface. A screen that is 8×6, which would equal 48 sq. ft., would need a 4,000-lumen projector.

 For home theaters with exceptionally low ambient light, you will need a minimum of 1,500 lumens. Rooms with windows, like classrooms, conference rooms, or living rooms, it is best to look for a minimum of 2,500 lumens.

             As your projector begins to age, the brightness that it outputs will slowly start to decrease. For a while it will not be noticeable, but once it starts to reach about half of its lifespan, you will start to see the dimness increase. Let us look at a BenQ MX662 projector for example, it has 3,500 lumens and a lamp life of 3,500 hours. So, at about 1,750 hours, it will begin to get more dim, which indicates we might need to purchase a new 5J.J7L.001 replacement projector lamp.

             There are a few ways to measure lumens. Most require a light meter tool, such as the procedure developed by the American National Standards Institute (ANSI). This includes measuring nine points in a projected image that is 100% white, with the projector being the only light source in the room. To measure the brightness of the projector rather than the light being reflected off the screen, the meter is held with its back flat against the screen, and the sensor facing the projector. The meter will measure in units called Lux. Then they use this formula to convert the measurement to lumens:

ANSI lumens = average of Lux readings X image area in square meters.Luckily for the average projector user who does not own an expensive light meter, we can now download apps on our smartphones that will do all that hard work for us! They might not be as accurate as an actual light meter, but it will give you a great estimate, which is all you need. All you will need to do is hold your phone to the light and it will measure the average amount of lumens for you.

Whether you are looking to purchase a new projector, or keeping up with your current one, lumens are a good indicator of what projector you will need, and when it’s time to replace your projector lamp.

Click over to our homepage to search for your replacement projector lamp today!

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Does Your Projector Need a Check-Up?

As the Covid-19 pandemic continues to impact our daily routines, many of us have been doing our best to practice social distancing and other safety measures. While we begin to settle in and get adjusted to our new at-home routines, one thing is for sure; we all need a little entertainment to take our minds off of these stressful and unprecedented circumstances.

ELPLP96 Epson
ELPLP85 Epson

Now is the perfect time to bring out your Epson Home Cinema 3100 projector! With it’s 3D technology, 1080p resolution, and 2,600 lumens of color brightness, it’s the best way to immerse yourself in the world of your favorite TV shows, movies, and video games. It might also be time to think about getting a replacement V13H010L85 replacement lamp, in order to avoid dim images and any untimely issues.

We have some tips to help you check-up on your projector and to make sure that you’re getting the top-quality entertainment experience you and your family deserve. 

 Similar to how people may go to the doctor when they can tell they’re feeling under-the-weather, or are not able to work at their usual pace, there’s certain symptoms that we can begin to recognize in our projector which may signify to us that it is time for a check-up. The first symptom that projectors will begin to exhibit is: a dull, dark picture as a result of dimming that unavoidably occurs as projector lamps begin to age. At that point, it’s usually a great idea to purchase a replacement projector lamp, not only to restore your brightness and color quality, but also to avoid any damage to your projector in the future, which can be caused when an old projector lamp is left in for too long.

ELPLP96 Epson
ELPLP96 Epson

For example, if you have an Epson Home Cinema 660 projector, your projector is capable of displaying 3,300 lumens for about 6,000 hours. It initially is very bright, then, after about 4,500 hours of use, you’ll really begin to notice the decrease in brightness of the picture. This can indicate to you that it’s time to purchase a V13H010L96 replacement projector lamp. After the initial dimness, some projectors may flash certain colors or display a message on the screen to indicate that a lamp change is necessary. It’s best to avoid getting to that point. 

Another easy way to keep yourself updated on the health of your projector lamp is by checking on the projector menu. Many projectors will show the number of hours the projector has been in use. If your projector doesn’t have this feature, then the lifespan of the lamp can be located in the user guide or manual, and you can simply subtract the approximate number of hours it was in use from the life span.

ELPLP68 Epson
ELPLP68 Epson

Whichever method you use, it is recommended that you consider purchasing a replacement projector lamp when the lamp approaches 75% of its life span. Let’s take an Epson H421A as an example; it has a life span of 4,000 hours, so 75% of its lifespan would be 3,000 hours. That is approximately when a replacement V13H010L68 projector lamp could be in order.

Another thing to keep in mind is, when you receive your replacement lamp, it is strongly recommended that you install the new lamp while it’s still under warranty. 

         Stay safe and healthy from all of us here at PurelandSupply.com

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