How many lumens do I need for a bright room projector?

Most classrooms, boardrooms and conference rooms are designed with large windows and enough light resources. It creates a surrounding with much more brightness than usual. However, projectors are typically designed for low-light settings, such as theatres. Choosing the right projector for bright rooms with larger spaces has always confused many. One of the common questions that the manufacturers get asked is, “How many lumens do I need for a bright room projector”?

Finding the right projector for a bright room is a tricky endeavour. But if you know the related terminologies and have some knowledge. You can easily shortlist the best projector according to your needs. Therefore, we came up with this article to give you a glance at the terms and tricks related to the brightness you need for a bright room projector. 

So, without wasting a moment, let’s get along.

What are lumens? 

The main thing you will ever notice in the projector’s specification is the projector’s lumens. The projector’s brightness, essential for projection in a bright room, is referred to as lumens. Almost all projectors come with different brightness values/lumen. However, it must mention that you cannot compare projectors based on lumens. Especially if they are from different manufacturers, however, it can compare two different models from the same manufacturer. Different manufacturers use different terms like ISO peak, lux etc., referring to the same thing, i.e., brightness. And that is because none of them is a universally standard measurement.

Can I use a projector in a bright room?

A common question is: How many lumens are required for in-room projection? Or can I use a projector in a bright room? The answer depends on the fact that how much ambient light is present inside the room. Ambient light refers to the light naturally present in the surroundings or within your viewing space. It results from almost any source present in the surroundings, including the windows, fluorescent lights, headlights etc. Even the light that spills from the sides of the curtains. Let’s say the ambient light has a more excellent value than the brightness of your projector, and it will interfere with the projector’s light and steal the projector’s brightness, affecting the image quality and resulting in blurry and faded images. The most effective way to overcome ambient light is to choose a brighter projector. It is a thumb rule that the more ambient lighting in the room will require you to have a projector with much more brightness. So, if your projector has enough lumens to combat ambient light, you can surely use the projector in a bright room.

How many lumens do I need for a bright room projector?

A bright room means a room with large windows and ambient lighting. The ambient light is uncontrollable in large spaces such as classrooms, conference rooms or museums. Usually, for projection in such rooms, different strategies are usually followed to cancel out the effect of ambient light to get a more focused projection. The prime trick is to use a brighter projector. A projector with a higher lumen is ideal for projecting in a bright room. 2500 lumen is considered to be the minimum threshold for bright room projection. 

However, you can also upgrade to 5000 or more lumens, reflector screens are used. But the lumens for a bright room projector must be in thousands, not hundreds. The higher lumen of the projector will cut right through the ambient light giving you the best results. You can also get the best results by controlling the in-room lights by shutting the blinds or turning off a few lights. Installing blackout curtains or ALR screens will be a good purchase if you want to spend some money on the projection. 

How many lumen projectors will be good for much larger spaces?

Classrooms, auditoriums, museums and conference rooms are designed with large spaces and enough brightness. Natural and artificial lighting is inevitable in these rooms. Moreover, the classroom and conference room typically use an 80+ inch diagonal screen. In that case, a projector with 2500-3000 lumens is the minimal requirement for presentations and projection in these spaces.  

However, the situation worsens in two conditions: the room is too large or too bright. For example, a room like an auditorium or a large lecture hall with 100+ seats. You cannot hold onto the essential 2500 lumens; instead, you need to upgrade to a quality 4000 lumens or higher. The 5,000 to 8,000 lumens are considered an ideal choice for these rooms as they are relatively more capable of handling the brightness. You can also go to more high-end projectors according to your need. For a large space with controlled to medium lighting projector, with2,000-4,000 lumens work better. However, get a projector with 4,500-6,000 lumens or more for more bright light or daylight interference.

What is the difference between controlled and bright light in a bright room?

Inside a bright room, you can control the lighting to some extent. For example, you can close the curtains, turn off a few lights, and use an ALR screen. These strategies are adopted to avoid the bright light interfering with your projection. However, the space where the bright light is unavoidable can be an issue. It usually happens in an outdoor environment, boardrooms, or rooms with open windows and no curtains.

 You can use a projector with 2500-3000 lumens in the areas with controlled ambient light for better results. But bright projectors are a must for projection in rooms with extra ambient light. Therefore, business, meeting and education projectors come with high brightness. Brightness is of critical importance for projectors designed for bright rooms.

Can I use an ALR to project in a bright room?

Reflector screens are used to deal with the extra amount of light and make the projection more visible. They possess the ambient light reflection ALR technology and can focus the projector’s light on the audience by reflecting the ambient light away from the audience. The ALR screens are made of effective material and are used to avoid the invisibility of the projected image. They need a proper angle adjustment and image viewing placements; the rest will be done by themselves. Suppose your projector’s brightness is 1000 lumens; an ALR screen will increase the value to 1200 lumens. ALR screens are also recommended alongside a bright projector for presentations in a bright room. However, before purchasing ALR, you must keep a check for the projector throw it is designed for. The throw refers to the distance between the projector and the projection. Not all ALR work with a similar throw projector. It is due to the way the screen is designed to reject the ambient light – often angled from above and below and on each side. Using the same ALR for two different projectors will reflect projector light as ambient light. It will affect the quality of the projected image negatively. Moreover, ALR screens can be expensive, but their highly effective properties are worth the price. It is a fantastic choice when it comes to a bright room.

How to Setup a Projector in a bright room? How to use a projector in a bright room?

Projectors specifically designed to project in a bright room include professional projectors, educational projectors, business projectors and so on. Most of them are lightweight and easy to set up. Also, they come with multiple specifications. Since projectors are a considerable investment, it isn’t easy to buy multiple projectors for each purpose. Also, not all rooms are dedicated theatre rooms. A bright room projector has to deal with the high ambient light. 

The minimal 3000-4000 lumen is not the standard to project in a bright room. The values may change depending on where the projection is taking place. Business meetings are arranged in conference rooms; the education projector setup is in a classroom with enough lighting. Or you may have a projector set up in a parking lot theatre. Secondly, what kind of content you’re planning to watch. For example, watching horror games will need more brightness. Alongside this, the screen size, the contrast ratio and the type of content combinely determine the amount of lumen you need. It is not possible to purchase a projector for every different setup. However, sometimes a single projector is used for multiple purposes. Just a few critical points about projector setup make a huge difference.

Keeping the angle placement, projection distance, and audience seating arrangement can help you in this regard. Projecting with a projector in close proximity to the screen can result in a small screen. However, a projector placed further away will cause a faded image with washed-out colours. Our ultra-short-throw projector designed explicitly for bright rooms is specific, standard throw, short throw. Some standard throw projectors can also serve well. It affects the projection size and the image quality. Consequently, all factors must be taken into account while buying a projector, including the purpose and the requirements. Only then you’ll be able to get the possible results out of the projector.

Factors to Consider when using a Projector In Daylight

In a bright room, you will need thousand of lumens to ensure that your presentation is visible to everyone in the room. But some other factors affect the projection in a bright room. A few of them are discussed below:


Suppose you have a presentation in a bright room with open windows and no curtains. There are chances that the sunlight will fall on the projection screen directly. It will wash all colours off your screen and make your image appear faded and blurry. And you will have to squint your eyes a little more to read the text. To avoid this, it is recommended to use curtains or try to cancel out the extra lights. Also, the sunlight can damage your projector’s delicate components. Therefore, it is a must for you to make sure that minimal light falls onto your projection screen.

Keep the room as dimmer as possible.

No doubt you’re here to project in a bright room. However, you can reduce the brightness by turning off a few unessacary lights to get the best results. It is entirely optional. But it will undoubtedly give you the best possible results. For a 3000 lumens projector, at least 20% dim lighting in the room is recommended.

Do not project on a wall:

You may not know, but there are two kinds of brightness, i.e., white brightness and colour brightness. The white brightness makes your text to be sharp and visible. In contrast, the colour brightness helps you see the images, videos etc., with much-enhanced clarity. For businesses projector, both types of brightness are essential.

The concern is not to use a white wall to project or not project on a white wall in a bright room. It is because it will absorb all the white light from your projector. And make it hard for you to perceive the projected picture correctly. Therefore, it is better to project on a screen than white light.

Use a dedicated projector screen to project in daylight.

A dedicated screen does not always have to be expensive. You can find some affordable options with a more excellent capability to reflect the daylight in another direction. It enhances the screen gain, which refers to the reflection value of the projector. With a projection screen, you improve your perceived brightness. Screens are recommended when you do not want to buy another projector. Also, pay close attention to the screen’s texture, design, and angle placement and customize it for better results.


Everyone knows the importance of bright projectors in a bright room. Therefore it is a commonly asked question: How many lumens do I need to project in a bright room? And, of course, the answer will significantly affect the resulted image quality.

We have tried to explain the answer in this article in every possible detail. However, to conclude, it is essential to remind you that you need a minimum of 2,500 lumens for a bright room. You can also go with 3000, 4,000 and 5,000 lumens or more. However, up till now, the 8,000 lumen is the ideal value for a bright room with ample space. You can also enhance the brightness through strategies.

We hope that the answer has satisfied you well enough. Moreover, if you have any other queries, please comment down below.

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