RE: [AGA Member] Light in deep tanks

["Pedro Borges" <mrpcb@netcabo.pt>]

I think one particular factor is also important. Since fluorescent lamps
are enlongated over the majority of the surface area, any point in the
bottom has an equivalent point at the surface WITH a light source, that
way you have (at least) almost vertical light beams from top to bottom
in all the water column. Spot lights on the other hand will produce high
refraction on the sides of the tank, thus making it harder to light the
borders of the substrate.
This in only regarding the "fluorescent" difference from other lamps, in
pure light terms you'll have what has been written already, exponential
loss of light, from red to blue... First you lose your reds, then your
yellows, greens, cyans and finally blues and violets...

cheers

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