A Guide to Projector Lumens Required

How bright is bright enough?

HDTV projector lumens image

When selecting from the many choices of projectorsout in today’s market, you might be curious to know if brighter is always better when it comes to lighting. As the higher the lumen rating goes up so does the cost to purchase. Take for an example a 4000 lumen projector will cost more then a 3000 lumen projector.

There are many points of consideration related to projector lumens required depending on the application. An HDTV projector lumens used for home theater purposes will require a different brightness level then one used for business purposes.

Home Theater Users / Buyers: For most home theater set-ups you can safely get away with a brightness rating of 600-1200 lumens. The less ambient light around when viewing the less brightness is required. If the room has ambient light from windows or household lighting you might be better suited to stay around the 1200 range. The truth is that for todays home theaters brightness isn’t really that important of a factor which is why you will notice that there are very few home theater projectors over 1200 lumens. The time and money is better spent on trying to reduce the ambient light hitting the screen and on features that important for home theater uses such as high contrast and a good video processing chip.

  • Dedicated home theaters need around 1000 lumens or better.
  • Rooms with some ambient light should have at least 1200 lumens.

Everyone else: Your presentations isn’t going anywhere if your projector can’t produce enough light to show clear images projected on a screen. Therefore, the brightness of your unit is worth investigating. Generally the brighter the room the brighter the projector will need to be. Many people not familiar with projector brightness find it difficult to determine the minimum brightness they require for their presentation.

  • Projectors below 700 lumens usually require dimmed lighting. (Take note! Dimming lights often lead to a sleeping audience)
  • Projectors between 700 - 1200 lumens are adequate for most boardrooms and conference room setting with normal lighting.
  • Projectors of 1000 lumens are necessary for shaded daytime presenting outdoors.
  • Projectors over 1500 lumens are recommended for courtroom settings.
  • Projectors over 2200 lumens are required for projections larger than 300″ diagonal.
  • Projectors between 3000 and 10,000 lumens are required for concert or amphitheater audiences (thousands of people).

projector lumens required image

Quick Chart

Projectors with: Generally works best in these environments
500 to 1,000 lumens
  • Normal sized conference rooms
  • Medium size audiences
  • Reduced lighting
1,000 to 1,500 lumens
  • Large conference rooms or classrooms
  • Normal room lighting
1,500 or more lumens
  • Large venues, including conference rooms and auditoriums
  • Most lighting conditions

Things to Consider When Choosing Brightness

There are four primary considerations when choosing the projector lumens required or projectors brightness:

1.) What room size will the projector be used in? This determines the size of the projected image that is required for easy viewing or everyone present. As the room size increase, the image size should increase as well for the optimum viewing pleasure of each occupant. An obvious result of this is that the perceived screen size will vary with distance. An increase in screen size thrown diminishes the perceived brightness of the projector as the light is spread.

2.)What type of projector screen will the image be thrown onto? The screen is the final element in the picture delivery system therefore the choice of projection screen is a point to be considered in determining the brightness required. A higher screen gain will increase the screens brightness, which will increase the perceived brightness of a lower lumen rated projector. On the other hand a sales presentation onto a wall or whiteboard will require more lumens that if it was thrown onto a quality screen.

3.) How much light is in the room? The amount of ambient light in the room will impact the brightness required for the projector. Obviously the darker the room the less light is required.

4.) What is your application? How bright your presentation projector should be is determined by the setting that you are going to be using it in. Brightness is measured in ANSI lumens (or just lumens), and the more lumens produced by the projector, the brighter the projected image will be. Similarly, the brighter the room that you will be presenting in, the brighter the lamp you will need to produce a quality image. Audience size is also a factor, in that a larger audience will require a larger image for viewing, and a larger image will require a higher light output.

Final Consideration

4000 lumen projector image

There is more to image quality than just brightness rating. Brightness uniformity is also very important. Uniformity is the percentage of brightness carried from corner to corner and edge to edge of your image. A higher uniformity rating means better consistency throughout your image. For the most consistent image, look for a uniformity rating of 85% or better.

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