Light Throw Distance Calculator

Typically the more lumens a light fixture provides the brighter it is.

Light throw distance calculator.

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. Using a digital light meter digital lux meter or lux meter app light meter app on your phone. 5 for all values except projector output and screen luminance. In this video learn how to calculate the beam distance of a flashlight.

Put in two of the values and then hit calculate to find the third value. First of all divide your set into overlapping acting areas. 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. One lux is equal to one lumen per square meter lux lumens m 2.

The further the light has to travel the more it will be dispersed. Values can be in feet or meters but both values must match. 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 scale of projector is not accurate.

Lens layout varies dependent on projector. 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. Use the multiplying factor. Just enter two known values and click the calculate button to calculate the unknown value you are looking for.

So for example the most common projector throw ratio is 2 0. The calculator helps you to calculate the exact beam angle. Essentially as light travels from the emitter it will disperse throughout an area. For any given projector the width of the image w relative to the throw distance d is know as the throw ratio d w or distance over width.

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. Find your screen size and throw distance with the projection calculator classic by following these 2 easy steps. The calculation result is from the lens center of projector. Multiplying factor x throw distance diameter of area covered mf x t d.

Measureing lux flashlight beam distance throw range yards meters. 1 metre 3 2808399 feet. Don t try a 3ft image size with a 5m throw distance the answer will be wrong.