Hood angle and light

[Jimbo]

I've noticed if I angle my hood some that more light reaches the tank, it seems to be considerable(eyeball test). It only has to be a couple of degree's. I have my square hood lined with reflective material. Any other people noticed this? I take it more light is being reflected off the glass of the tank this way. I am making some assumptions here, but believe the right angles involved in the hood allows the light to pass through the tank glass. I'm going to modify my hood to be at a slight angle. Also the spectrum seems whiter. Try this on your tank and let us know if I'm just imagining things. LOL

Have a great day!

[Doug1]

Jimbo. I havent noticed much effect from tilting the canopy, per se, and I am not a physisist, bet it stands to reason that if the front and rear of the canopy are angled at 30-45 degrees(assuming a fairly reflective surface) that more light rays will bounce back into the tank. The proper angle might be determined by measuring the distance from the reflective panel and the opposite side of the sand bed. I believe thats the reasoning behind the parabolic reflectors popular with metal halide lights, to recover and reflect max light down into the tank rather than lost off to the sides, FWIW

[mikeMersot]

As doug stated this is because your hood has only right angles, the more parabolic the reflector, the more light will be focused down into the tank rather than going through the glass or reflecting off the surface of the water, by tilting the hood you are causing the light from the top and one side to focus more into the tank. This should have no effect on color spectrum.