Divide the inch measurements by 12 and then multiply the width times the height. Round to the nearest whole or half number and you should have an area of 30 square feet. Step 2. Divide your projector’s lumens by the screen’s area from step 1.
How do you calculate foot lamberts?
A foot-lambert equals 1/π or 0.3183 candela per square foot, or 3.426 candela per square meter (the corresponding SI unit).
How do you convert lumens to ANSI lumens?
Directly measure the light source’s brightness. In general, 1,000 LED lumens converts to 417 ANSI lumens (LED lumen value ÷ 2.4 = ANSI lumens; the conversion rate is based on the manufacture’s publicly disclosed numbers).
How much ANSI lumens do I need?
An ANSI lumen rating uses an average of several measurements taken across the face of the light source. A small room typically requires from 200 to 300 ANSI lumens, whereas a large room may require from 400 to 600. A large auditorium may need 2000 or more. See lumen.
How do you convert ANSI to lumens?
How to convert foot-lambert (other units) to other units?
This converter is very easy. Really. This is a conversion chart for foot-lambert (Other units). To switch the unit simply find the one you want on the page and click it. You can also go to the universal conversion page. Enter the value you want to convert (foot-lambert). Then click the Convert Me button.
How do you calculate footlambert luminance?
A footlambert equals 1 / π candela per square foot, or 3.4262591 candelas per square meter (nits). The luminance of a perfect lambertian diffuse reflecting surface in footlamberts is equal to the incident illuminance in foot-candles.
What is the unit of footlamberts?
A foot-lambert or footlambert (fL, sometimes fl) is a unit of measurement of luminance in U.S. customary units. A footlambert equals 1 / π candela per square foot, or 3.4262591 candelas per square meter (nits). The luminance of a perfect lambertian diffuse reflecting surface in footlamberts is equal to the incident illuminance in foot-candles.
What is the difference between Candela and ft-L?
Foot-Lamberts 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.
