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Originally Posted by ree-fready
It is not a good idea to use a mirror because it will cause a hot spot in your bulb as well from the light not being deflected by a curved or textured surface. So I`ve been told.
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I have seen a couple people say this now and I am not sure how it could be true, the reflected light energy will be cooler than the bulb its self, while I can see it raising ambiant tempature I can not se it creating a "hot spot" and if you look at any reflector there is no such thing as a reflector that does not reflect any light back onto the bulb.. We try to minamize this but to me this is because we want as much energy to go into the tank as we can get and that light reflected back onto the bulb is waisted light.
I don;t think creating a "Hot spot" is a viable concern, but rather a sales gimic. Infact if you think about it a curved surface would have more of a ability to focus a wider path of light onto a small point of the bulb.. there for a curved surface would have more of a chance of creating a hot spot than a flat surface.
JMHO
Steve
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