Foot-Lamberts, or ft-L, takes the same unit of light used in defining nits, the candela, but applies it to the unit of area customary to the United States, square feet, meaning that 1 ft-L is equal to 1 candela per square foot. Nits is a unit that measures brightness in terms of area, or in technical terms, candela a standard unit of light equivalent to the light produced by a single candle per square meter. ANSI Lumens is a unit, defined by the American National Standards Institute ANSI , that measures the overall amount of light output by a projector, in other words the higher the lumen value for a projector the brighter the light it produces.
To answer this question, one must take a deeper dive into what lumens means. For example, the image produced by a projector that is projecting onto a 1 square meter screen is ten times brighter than if the same projector — with the same lumen value — is projecting the image onto a 10 square meter screen.
In that sense a unit such as nits comes in handy specifically because it does take surface area into account. Nits by specifying light in terms of area allows a user to define and compare brightness as it appears on the screen, so that an image that is nits is by definition brighter than an image that is nits. GS50 is the world's first p outdoor smart projector with 2.
GV30 is world's first smart portable projector with 2. Revel in the uncompromising image quality and outstanding contrast control even in brightly lit environments. The ultimate experience in laser TV entertainment is now in your home. If the information provided only gives you one lumen rating, it is typically referring only to the white brightness of the projector.
The actual brightness of color may be as little as one-third of the lumens stated. The amount of brightness you need is determined by the room you project in.
Projector brightness is measured in lumens. For home theater projectors where ambient light is kept to a minimum, you'll need a minimum of lumens. For classrooms, conference rooms or rooms with windows, a projector with a minimum of lumens is best.
Projector LUX measures the amount of light falling on the screen. Lumens is equal to the LUX measurement times the screen area in square meters. White Brightness or Color Brightness of the projector has to be measured at the screen as defined by the scientifically approved standards. There is no officially recognized standard for what some in the industry call LED Lumens.
We did a side-by-side comparison of two projectors, one claiming their brightness at 6, LUX and the other claiming 6, ANSI Lumens and the outcome was clear pun intended. I also made sure the projectors were in their highest lamp mode. I also measured brightest at full wide angle because the iris is wide open allowing the most amount of light to get through. Even before I measured the two units, it was obvious that the Lumens model was significantly brighter. When tested, as you can see from the photo above, the difference was significant with the Lumens-rated model nearly nine times brighter than the LUX rated model.
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