In a word, ideal light intensity is critically crucial for your tank. In the end, most plants are probably suffering death. The aquatic plants’ leaves will gradually turn yellow and even decayed. Without photosynthesis, your plants can not get the necessary nutrients to grow, as well as produce oxygen for your tank. Furthermore, too much light will accelerate the thriving of algae, which may be bad for your tank.Īs for aquatic plants, they need enough light intensity to photosynthesize. So you should decrease the light intensity at night or turn off the light. As for many fish, they need rest at night. And the light intensities during sunrise and sunset are different. The cycle tells them when to eat or rest. Not only humans, but fish also follow the circadian cycle. However, how does the light intensity bring effects to your aquarium? Here we should know one word – circadian cycle. We know that different aquariums require different light intensities. Aside from that, reef aquariums may require higher light intensity, 4-8 watts per gallon may be an excellent option. However, 10-20 lumens per gallon or 1-2 watts per gallon is ideal. By the way, for more details about light settings for aquarium low-light plants, please go for Light Settings for Aquarium Low-light Plants.įor fish-only tanks, you can set the light intensity according to your preference, seeing that it is no need to meet the demands of aquatic plants. Take cryptocoryne costata as an example, it can survive at 50 lux. In general, light intensity below 100 lux is not good for aquatic plants. The light intensity should meet the requirement of photosynthesis and metabolism. We are likely, to begin with, planted aquariums. One tip in advance, the light intensity will change with various water depths – the deeper the water, the dimmer the light intensity. In this segment, we will discuss the ideal light intensity in different types of aquariums. If the luminous flux on one square meter is 1 lumen, then its illuminance is 1 lux.īe clear of the units of illuminance (light intensity) and luminous flux: Items Also, it means the luminous flux of visible light per unit area. It is the rate at which the surface received energy from the light. Light intensity, abbreviated as illuminance or illumination, refers to the brightness of the light. How does light intensity affect the rate of photosynthesis?.Today, let’s learn more about aquarium light intensity! Content Table Besides, the light intensity also affects the color and growth of fish. Meanwhile, adjusting light intensity can limit the growth of plants. Only when the light intensity meets the demands of photosynthesis, the aquatic plants can better make sense in your tank. It is reported that not only the lighting hours bring an impact on your aquarium, but also the light intensity.
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