Adding parabolic reflector onto fixtures - The Planted Tank Forum
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post #1 of 3 (permalink) Old 05-17-2014, 06:53 AM Thread Starter
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Adding parabolic reflector onto fixtures

Since the light spread angle is 120 degrees, is it possible to add an aluminum parabolic reflector onto the existing fixture to narrow the spread and increase intensity? This would also increase PAR and also prevent the light from shinning out, blinding the viewer.
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post #2 of 3 (permalink) Old 05-23-2014, 08:25 PM
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You could do this, not sure how useable/strong the light will be afterwards though. It has been my experience in the past, that light that is bent multiple times before it reaches where it is supposed to go, loses the vast majority of its strength, while it still may appear bright to us. Think of it like the flow of water, just really super fast flowing water, the more turns and twists water has to travel the slower the flow is at the end point. I hope this kinda makes sense, one of the guys at my local hydroponics store gave me an unwanted 1 hour lecture on reflectors and light waves and he used that analogy. I think Hoppy knows a bunch about lighting, maybe they will add in some more wisdom.
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post #3 of 3 (permalink) Old 06-07-2014, 07:55 AM Thread Starter
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I'm not worried about losing some light as the reflector would still direct more light downward. 120 degrees is a helluva lot of light that is lost per distance than a 60 degree light angle. It would allow the light to be hung much higher and still have the same light intensity, as well as better light coverage.
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