These lights feature blue LEDs that highlight the fluorescent colors of the fish. Use one for a 5-10 gallon aquarium or two for a 20-55 gallon aquarium.
In contrast to most other light sources, e.g. halogen and incandescent lamps, LEDs hardly emit IR light (unless specifically designed to emit a certain type of IR). For available types of indoor light sources the IR radiation is not powerful enough to pose any risks to human. But these are not aquarium lights being discussed there! Tell me why my lowly nano lamp comes with warning for both UV and IR and blue light (even though it is not stated clearly about the blue light)? This nano fixture is supposed to be not that powerful, now what about other more powerful lights?
42 LED Aquarium Submersible White Blue Light Lamp Bar, Waterproof light bar and cable. 42 bright white LED lights can make your tank look like part of oceans, and your fish and reptiles seen where they're swimming or moving.
GloFish Blue Light Aquariums and Products | Tetra Aquarium
Aqueon T8 Actinic Blue Light Fluorescent Aquarium Lamp, 17 Watts
Our human eyes respond best to the green spectrum, the one that is least implicated in photosynthesis. However, the blue spectrum is arguably the most important part of the light spectrum for both planted freshwater and marine reef aquariums.Daytime Viewing – We recommend a blue wavelength light (such as those available on ). A blue light will give GloFish an exciting and uniquely fluorescent look, particularly in low lighting environments. Alternatively, a traditional white aquarium light (such as a fluorescent or halogen light) will work well for daytime use.So next time you’re gazing at your amazing marine reef aquarium and admiring how beautifully the blues are popping from some of your marine fish, or how intensely some corals are fluorescing, remember you owe that to the short wave lengths of visible light.To have a successful reef aquarium, adequate light is absolutely required. Reef tanks contain soft and hard corals which harbor zooxanthellae. The zooxanthellae (symbiotic algae) must thrive in order for the coral to live. To do this they need the correct amount of light (intensity) at the right wavelength (peak absorption). Actinic lights provide a concentrated light wavelength that promotes photosynthesis. If only actinic lamps are used, however, the water color in the tank will be very blue which is not visually appealing and the light is not intensive enough for the other processes of the aquarium inhabitants. Therefore a reef tank should have a combination of one actinic lamp and one or two daylight lamps for each 30 gallons of water. The daylight lamp can be either a metal halide bulb or daylight fluorescent lamp (preferably HO or VHO). The color temperature of the bulb or lamp should be 5,000 to 6,000 ¡K.Plant tanks require the correct lighting to be successful. The number one reason for lack of success in growing plants in an aquarium has to be the use of the wrong lamp. Plants have two types of chlorophyll, a and b. Chlorophyll a absorbs light at 405 and 640 nm. Chlorophyll b has a peak absorption at 440 and 620 nm. Plant lamps are designed to emit light at the red wavelengths to duplicate the job of the sun. But too much red color can cause aquatic plants to grow tall and thin. For best results, use a daylight (5,000 ¡K) lamp such as an Aquasun, Ultralume 50 or Chroma 50 in combination with an actinic white or actinic day lamp. The actinic day or white lamp is a mixture of 50% actinic (blue light) and 50% daylight. In large or deep aquaria consider using HO or VHO lamps.My aquarium (Riparium) is a constant work in progress. I run a lower tech system with a 20 inch tall canopy. I use T-5 lighting. I use 1 day light bulb and 2 atinic blue bulbs; at 3 watts per gallon. I have a lot of fast growing plants (some above the water line), and a few small fish; so algae is not much of a problem. I perform a 30% water change once every 2 weeks, with top off in-between. Nitrates stay below 3 ppm.