This calculator provides a rough estimate based on a etendue calculation.
Led downlight beam angle calculator.
What is a beam angle.
In simple terms it is the width of the light emitted from the luminaire measured in degrees.
Led downlights are available in a multitude of beam angles.
Just enter two known values and click the calculate button to calculate the unknown value you are looking for.
Let s suppose that you want to install downlights that emit a light beam at a 30 degree angle.
Just select the layout enter the room s dimensions and hit calculate.
How many led downlights do i need per room kitchen bedroom bathroom living room dining.
A change in the beam angle affects the luminous intensity lux of a light source but not the luminous flux lumens.
Led downlight calculator australia lectory lighting calculator placement spacing.
The first calculator helps you understand the relationship between beam angle lumens distance and lux.
Led beam angle guide with beam angle calculator the beam angle of led luminaires and illuminants determines how large the light cone appears in the room.
Please note that the estimate works for leds with a lambertian beam angular profile.
Most leds produce a lambertian beam.
Obviously you get more technical when considering ceiling height lumens and beam angles.
Here you can find out what the bream angle in degrees means and what you should pay attention to when choosing a directional led light.
Beam angle calculator this convenient calculator will determine the beam angle the beam spot size or the distance of a beam.
Once you have arranged temporarily the four corner downlights you can carry on and determine the distance of the other light fixtures.
Lighting design workbook free online led downlight calculator australia.
The right distance between the light fixtures in order to prevent the formation of dark areas is about 1 metre.
Measure the area and enter it here.
Enter the size of your led chip or select from one of the defaults we have entered and the desired lens size to calculate the achievable beam angle.
Obviously this calculator does not cover all of the possible room shapes or all of the.
For example a beam angle on 30 degrees means the light has a shape of a cone and its borders form a 15 degree angle with the center axis.
How to use it.
If you re unsure of how many lights the room needs there s a calculator on this page that will help.
Filter by beam angle.
A common misconception is that the area outside the stated beam angle would be dark however this is not the case with common residential lighting.
For example if you install an led oyster light with 1 425 lumens and a 120 beam angle in your laundry then you can expect about 202 lux at workbench height 1 5m from the ceiling.
