question in Ballast (13)
Hi Guys, I don't understand the highlighted sentence in below image. I hope someone can explain it for me. Thanks very much in advance.
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I think this website is helpful for visualizing the cutoff angles. https://www.erco.com/en/guide/designing-with-light/luminaire-arrangement-2204/
The same light fixture with different cut-off angles, is going to have different curves. The lower the angle (angle a°) the more spread out the light is.
A 90° angle would be straight down.
Due to their narrow light distribution, downlights with a 50° cut-off angle achieve very a high visual comfort for high rooms.
With a low cut-off angle (like 30°) the circles of light are going to overlap, which could cause glare.
Hope this helps!
Rebekka O'Melia, B.Arch, M. Ed, Registered Architect, NCARB, Step UP ARE 5.0
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