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Just added some new blue lights to my 4 ft fish tank for when the main light is switched off.
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The benefits of using LED lights are many. They take less energy to run, in fact quite a bit less. LED aquarium lighting uses up to 80% less electricity than other aquarium lights. They also do not generate the heat that fluorescent light bulbs do. Another very popular plus is the fact that they last far longer than .

LED lights can be dimmed, and programmed, allowing for a natural dimming at sunset and the reverse at sunrise. This is particularly good for nocturnal fish, as a dim blue light can be left on the tank to simulate moonlight, and allow for feeding and viewing purposes. Last, but not least, they come in a variety of colors, which can be used to accent the tank in interesting ways.
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please need help Blue light is detrimental to you and lightly to your fish. Like you and other diurnal lifeforms plants also need a period of complete darkness. It does so by altering the natural patterns of light and dark in ecosystems. Your tank is an ecosystem I have blue LED's, Actinic and T5 lights for my 65 gallon fish and coral tank
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Photo provided by FlickrI got a new tank for my male guppies and it has a neon blue ligt. Is this ok for my guppies? Or would the blue light be better with my blue male betta fish?
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Beyond choosing lighting that is optimal for photosynthesis, as above, you should choose lighting with the color temperature that best suits the aesthetic goals of your tank. So, don't obsess about color temperature beyond how you want your tank to look. From a color temperature standpoint, blue-colored light will enhance blues in your fish. Green-colored light will make the tank look bright to humans and enhance the green color of your plants. Red-colored light will enhance the reds in your fish, and any red plants.Just like any freshwater plants you have in your aquarium, algaes need light to flourish. If you leave your tank lights on all day and night, you're providing a haven for the organisms to smother your plants, decorations and glass with their greenness. While certain fish and snails eat algae, leaving your lights on 24 hours each day will likely lead to an outbreak that's too much for even them to handle. Additionally, certain types of algae -- notably blue-green algae -- are stubborn buggers that most algae-eaters don't eliminate. Blue-green algae can also adversely affect your aquarium inhabitants' health if the algae amass in large enough quantities.Don't be fooled by color temperature as an indication of what wavelength of light may or may not be present. The emitted wavelengths of light for two bulbs with the same color temperature could be wildly different. Therefore, color temperature is not what you should use to determine useful light for growing plants. It will, however, give you an idea of how things in your tank will look. For example, the sky has a color temperature of 10,000K and looks blue. Lighting that has a higher color temperature, indicating that it is bluish, does point to the fact that blue wavelengths are dominant. This, in turn, just means that it will activate green plants in the blue range, which is a good thing, and enhance blue fish. Red photosynthetic pigment is less efficient at utilizing light and requires stronger light as a result. The less efficient red carotenoid pigment must rely on blue and some green light as well as more intense lighting. There are some plants that that are able to change the pigment they use for photosynthesis depending on available lighting. We see this in red-leaved plants that turn green if the lighting is too low, not enough blue and/or green light. Alternatively, some green leafed plants produce red foliage when closer to the light source or with overly bright lighting.· Blue-colored light will enhance blues in fish and aid in photosynthesis for plants.
· Green-colored light will make the tank look brighter to human observation because human eyes are sensitive to green light.
· Red-colored light will enhance the reds in fish, aid in photosynthesis for plants, and enhance the reds in any red plants.
Wavelength is used to determine useful light for growing plants (both blue light and red light are needed for photosynthesis).