everbright (spectral aluminum) is a higher grade and comes in at 98% reflectivity, if they are saying 95% then they are using some grade of spectral aluminum which surprised me as the answer I got out here is that you want a dispersaly type of reflector to avoid hot spots on your plants not at true reflectance type.
The problem with spectral aluminum is you have to know what metal was used to coat the aluminum. aluminum its self is very porus and no mater how you polish it you will never get close to the reflectivity of spectral aluminum.
When they make spectral aluminum they coart the aluminum with a smaller grained metal that allows for a smoother surface and hence more reflective. Silver is a very commen one that will give you about 93 to 95%. if you can find the products that are done using nickel, the reflectors I am running are tested at 98.9% reflectance and they are high grade nickel coated.
Steve
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 *everything said above is just my opinion, and may or may not reflect the views of this BBS, its Operators, and its Members. If cornered on any “opinion” I post I will totally deny having ever said this in a Court of Law…Unless I am the right one*
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