Coral Fish tank under blue LEDs and normal lighting. - YouTube

And from what I posted above.. as soon as they put blue lasers in fish tank lights.. i'll worry
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I've read this before from people using blue leds or actinic.. But it just makes my tank look so good.. You know the yellow that 6700k lights put out make tanks look so tiresome after awhile.. the "natural look" gets old lol... And as I said the blue actinic really makes fish and plants pop out specially my discus/neons and red plants.
20" Extendable 11W 72 LED SMD 2835 White Blue Light 2 Modes Bracket Aquarium Fish Tank Lamp
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I have in fact tried a blue light lifted from a saltie tank and the nocturnal fish took much longer to emerge from hiding (perhaps as a result of the fish not blending in as well from a distance as they do with red light?) WANT: Deckey 6W 36 LED Aquarium Fish Tank Extendable Light LED Blue and White Color Changing Frame Fish Lamp30 White Light 6 Blue Light
Photo provided by FlickrWhy does the led lights on top my fish tank turn the glass on top green I have all white or all blue
Photo provided by FlickrCoral Fish tank under blue LEDs and normal lighting
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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.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.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.If you'd like to watch your fish swim around at night, you can opt to add a moonlight to your tank. A moonlight typically features several tiny LED bulbs that produce a blue ambient light throughout your tank. Moonlights don't affect the night and day cycle of your fish, coral or plants, and they don't contribute to algae growth.