How to Increase the Brightness on a Projector?

February 25, 2020

How to Increase the Brightness on a Projector?

Whether you are using your projector for business or pleasure, a dull rendering can ruin the viewing experience. If you can get more brightness out of the projector, you can enjoy a viewing experience with more vivid colors and images that won’t strain your eyes.

There are several things you can do to increase the brightness of your projector. However, you need to keep in mind that there is a limit to which you can push your projector. Once you have reached this point, you have to start considering other alternatives to improve your viewing experience such as making the space darker, changing your projector lamp, moving your projector from its original installation point, etc. We’ll cover all these and more in this article.

So what can you do on your projector to increase the brightness?

How to Increase the Lumen Output of Your Projector

#1 Clean the lens

If you haven’t cleaned your projector lens in a while, dust and other forms of dirt can cover the lens. This will block off some of the light it emits and in turn lead to lower brightness on the screen.

#2 Clear the air intake and exhaust ports

Does your projector have a removable air cleaner? Consider removing and cleaning it. A projector that runs on its maximum light output will generate more heat, and will, therefore, need more airflow to stay cool enough to project crisp images.

#3 Increase the lamp level

If the spring cleaning steps above don’t yield any results, go over your lamp’s settings and increase it. If you are running on modes such as “quiet”, “eco” or “long life”, it means that the projector is performing at the optimal level to:

  • ensure longevity for the lamp,
  • cut down your electricity consumption
  • reduce the noise from the projector’s fan
  • all of the above

This setting will cut back on the power sent to the lamp, which in turn affects the brightness level.  You can remove your projector from this quiet mode by navigating the “Lamp” menu. If you can’t find this menu, check for any menus that allude to energy savings or noise-reduction.

#4 Tweak the built-in brightness modes

How to Increase the Brightness on a Projector1

Many modern projectors come with pre-defined brightness modes such as Video, Movie, Cinema, and more. Some of the modes reduce the light to give more detail to the projected images, especially if you choose the cinema preset.  Other modes such as Bright and Dynamic increase the brightness settings of your projector to the highest possible level. It is not uncommon to find projectors that emit 1050 lumens in Cinema or Movie mode giving outputs of 2100 lumens or more in Bright or Dynamic mode.

#5 Change the projector bulb

If you’ve been using your projector over a long period, consider changing the bulb to increase the brightness.  Some projector bulbs may remain bright for their projected lifespan, but in many cases, the light outputs fall over time. By the time a bulb gets close to its lifespan, some of them would have lost more than 50% of the estimated brightness level.

What should you do if none of the above suggestions apply to your projector?

How to Externally Optimise Your Projector’s Brightness Output?

How to Increase the Brightness on a Projector3

a. Make the room darker

To maximize your projector’s brightness, close your windows and blinds if they are open. Direct sunlight will always take away from the brightness of a projector even at more than 4,000 lumens. Similarly, ensure turn off the lights in the room, especially if they are bright enough to reach the screen. If you reduce the amount of light competing with your projector’s brightness, you will get sharper images.

b. Change to a white projector screen

A grey screen, for example, will absorb much of the light emitted by your projector. This will lead to dull images. A white screen, on the other hand, will reflect all the light emitted, ensuring a sharper image all round.

c. Use high gain screens

High gain screens are fitted with special surfaces that increase the impact of the emitted light, thereby ensuring higher quality images. However, these screens make it harder to view projected images from any angle that isn’t directly in front of the screen.

Frequently Asked Questions on Projector Brightness

How Bright Should My Projector Be?

The brightness level of your projector (measured in ANSI LUMENS) should be determined by your specific use case. The room conditions and your purpose of using the projector should help you decide on the optimal brightness level for your projector.

The optimum brightness level for a home theatre projector or a projector used for indoor business presentations only is 2000-3000 Lumens.  Going higher than this brightness level in a dim room can lead to eye strain.

Projectors largely used in a well-lit room need to have between 3000 and 5000 Lumens brightness. This is to ensure that the image is visible in all corners of the room.  Your decision should be guided by the amount of natural or artificial light in the room.

How Does the Installation Process Affect Projector Brightness?

Projectors are either ceiling-mounted or set up to be portable for use on tables, desks, etc.  With ceiling-mounted projectors, the installation is neater and keeps the projector firmly secure. However, you need to know the distance between the installation point and the projector screen. This is referred to as the throw ratio. If your installation doesn’t consider the throw ratio, the projected image could be dull and grainy, even at the highest brightness setting.

With portable or table-mounted installations, on the other hand, you can move the projector around easily so the throw ratio will be less of a factor on the overall brightness of image renderings. However, before you choose a tabletop installation instead of a ceiling-mounted installation, consider the following:

  • The fan noise of the projector may be distracting during a viewing session.
  • For home theatres, the exterior design of the projector may stick out like a sore thumb in the overall design of your viewing area.
  • The installation may cause more clutter in the room, especially when you are running a wired connection.

If you don’t intend to use your projector outdoors frequently, a ceiling-mounted installation with attention on the throw ratio is usually the best option.

My Projector Image is dimmer than Normal-What should I do?

If you have used all the tips we have recommended above to clean your projector bulb and lens, without any results, it may be time for you to replace the projector lamp. Projectors can lose up to half of their original brightness as they age.  Check your projector user guide for an estimate of how long you should use your projector lamp. In some projector models, the lifespan of the projector lamp is calculated. Check the menu to see if you have this feature on yours.

How many hours should a projector lamp work before a significant decrease in brightness?

Projector bulbs have an expected lamp life expressed in hours.  This is the number of hours you can use the lamp before it starts working at half the full brightness capacity only.  There is no fixed number of hours for a projector lamp to work as this is determined by the lamp technology and the projector’s configuration. However, many lamps can give you 2000 hours of use if you use your projector for less than five hours a day in a dust-free environment.

How can I make my projector lamp brighter for longer?

There are a few things you can do to improve the durability of your projector lamp:

  • Ensure there is adequate ventilation around the projector’s vents to avoid overheating.
  • Don’t use the projector in a dusty environment.
  • Clean the air-filters on the projector every three months.
  • Only light up the projector when you are ready to use it to avoid switching on and off indiscriminately. Such careless usage burns up the electrodes in the lamp faster.
  • Don’t hit the projector or allow it to fall or hit hard forces. The shock can damage the lamp
  •  Use the “eco” mode or any similar modes to use the projector on a lower brightness level when you don’t need maximum brightness. You can increase the lamp life by up to 50% with this feature.
  • Don’t unplug the projector after power down until the fan has stopped working. This is to ensure the lamp has cooled down sufficiently.

How can I get replacement projector lamps to improve the brightness of my projector?

You can contact your original vendor for replacement lamps. If you can’t reach your vendor, a quick search online with your projector model can show you where you can get a new projector lamp.


A wide range of factors can impact your projector’s brightness level. By taking adequate care of your projector, you can keep the brightness levels high. Don’t forget to confirm that the lighting situation in the room is still the same as excess lighting can overpower the brightness on most projectors. If everything else fails, consider changing your aged projector lamp.

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