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The loss of light in the aquarium, depending on the depth

When calculating the lighting in an aquarium, you have to take lamps with a large power margin, since the light in the aquarium does not fall directly on the plants, and the light flux carries large losses even in the water itself. Let’s see why this happens. Have you ever looked at the surface of the water, saw it reflected?

Similarly, the surface of the water reflects the light falling from the lamps.

In addition, the water itself does not have perfect transparency, so much less light reaches the lower layers of the water than the upper ones. It was experimentally established that in water of average transparency for every 10 cm depth the loss of luminous flux reaches 50%.

All this is only approximate data, and what “medium transparency” means is not entirely clear to you, but this will be enough for general knowledge.

Here is a picture that clearly demonstrates the loss of luminous flux at the bottom of the aquarium at a certain depth.

If you have already decided to ideally calculate the lighting of your aquarium, then you cannot do without an instrument that measures illumination – a luxmeter.

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