Light Throw Distance Calculator

Just enter two known values and click the calculate button to calculate the unknown value you are looking for.

Light throw distance calculator.

Multiplying factor x throw distance diameter of area covered mf x t d. 1 metre 3 2808399 feet. One lux is equal to one lumen per square meter lux lumens m 2. Here you can calculate the direct relationship between the beam angle diameter of the light circle and the distance to the illuminated object floor table work surface wall picture.

This little calculator will work for all lantern manufactures whether it be selecon pacific an etc source 4 profile an robert juliat followspot robe moving light its only trigonometry. First of all divide your set into overlapping acting areas. The calculator helps you to calculate the exact beam angle. The calculation result is from the lens center of projector.

Using a digital light meter digital lux meter or lux meter app light meter app on your phone. Don t try a 3ft image size with a 5m throw distance the answer will be wrong. So for example the most common projector throw ratio is 2 0. This means that for each foot of image width the projector needs to be 2 feet away or d w 2 1 2 0.

For instance if you wish to know the coverage area spot size of a 10 beam mounted 25 feet off of the deck throw distance just enter these two values and click the calculate spot size to find the diameter of the spot. The further the light has to travel the more it will be dispersed. 5 for all values except projector output and screen luminance. Use this calculator to determine either the size of the circle of light how far away you should place the light or which degree of lens you should use.

Values can be in feet or meters but both values must match. Put in two of the values and then hit calculate to find the third value. Or try the projection calculator pro and get recommended screen sizes throw distances room lighting screen brightness seating and projector placement based on your application. In this video learn how to calculate the beam distance of a flashlight.

Then try and figure how far away from the actor the light needs to be throw distance to create a pool of light that is 8 10 feet in diameter at head height we light faces not feet. The scale of projector is not accurate. Finding the true range distance capability of your long range flashlights. Find your screen size and throw distance with the projection calculator classic by following these 2 easy steps.

Typically the more lumens a light fixture provides the brighter it is. Essentially as light travels from the emitter it will disperse throughout an area. Lens layout varies dependent on projector.