You cannot be the suns rays, but 4enzix's comment about the water depth is correct. The trick behind how much of the light gets into our tanks is sorta relative to how close or high we keep them above the water surface and how powerful the light is. If your tank is a short tank, you either don't want bright lights or you want to raise them higher. If you want a tall tank, MH
lights are a good idea.
There is such a thing as too much light. Ex. 400 watt MH
lights on a 10 gallon like 4enzix mentioned, but generally...most lights are not too bright.
Good idea to mention that that is why it's a good idea to research the animal you want to buy. If it grows in a deep reef, bright light won't be too good for it. Either don't get it, or make sure you have a shaded area in your tank to put it.
Sorry, no physics degree here either.
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