# Beam Angle

The beam angle is something you need to pay attention to when choosing the right LED lighting for the space. This is as important as the Lumens. Beam angle indicates the spread of light from the light source. A narrow beam gives a concentrated light which is better for accent lighting. A wide beam gives a more general, softer light.

First, and most importantly, if you install lights at a certain height, how much light will be on the surface area of your floor?  Our chart helps for a quick review, but for the ambitious just use the equation:

BEAM WIDTH = ANGLE x .018 x DISTANCE

 5ft Ceiling 8ft Ceiling 10ft Ceiling 12ft Ceiling 15ft Ceiling Light on floor at 15° beam angle 1.35ft Diameter Light Spread 2.16ft Diameter Light Spread 2.7ft Diameter Light Spread 3.24ft Diameter Light Spread 4.05ft Diameter Light Spread 25° 2.25’ 3.6’ 4.5’ 5.4’ 6.75’ 40° 3.6’ 5.76’ 7.2’ 8.64’ 10.8’ 120° 10.8’ 17.28’ 21.6’ 25.92’ 32.4’

(Reference :
http://www.planetled.com.au/choosing-the-right-led-lights
http://www.beaconlighting.com.au/led/how-to-choose-the-right-led-downlight
http://www.greenlightingled.com/blog/led-lamp-beam-angle-comparison-chart/)