I have always assumed not but just thought i'd check. Mine come on at 09:00 and go off at 00:30. I have the white LEDs on from 14:30 - 23:30. This means I can pretty much watch them any time and get to see the nocturnal fish doing theri thing when I feed at around 23:30.
Do blue LEDs actually do anything
- Thread starter seangee
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blue or ultra violet?
blue light has longer wave lengths and penetrates water more than red light. It is not as bright as some wave lengths and this means nocturnal fishes are less stressed by it.
u/v light is seen by many diurnal fishes and birds, and lots of fish and birds have colours that can only be seen under u/v light.
blue light has longer wave lengths and penetrates water more than red light. It is not as bright as some wave lengths and this means nocturnal fishes are less stressed by it.
u/v light is seen by many diurnal fishes and birds, and lots of fish and birds have colours that can only be seen under u/v light.
OP
OP
seangee
Fish Connoisseur
I do mean blue. The type often sold as moonlights. My aquarium came with LEDs in the hood and 2 timers. Timers are simple on/off times and only have a single on period in 24 hours - but separate timers for blue and white. Certainly have no algae problems and if I leave the white lights off for a few days the cardinals lose their colour, so I suspect that from the fish viewpoint its close to having lights off.
There are 56 white diodes and only 12 blue.
There are 56 white diodes and only 12 blue.
If you mean just "moon light" LED, they are useful to provide a transition from full tank lighting (your "daylight" white light over the tank) to complete darkness (meaning, the room is in total blackness too, no ambient lights), but keep the period short. Three and a half hours is a bit long, but not going to bee much of a problem. Fish need a period of complete darkness for several hours every 24 hours; this is connected to their circadian rhythm, and their level of stress and various functions centre around this.
Just to be pedantic:
It's the other way round - blue light had a wavelength of 450 to 490 nm, and red is 620 to 780 nm. UV is below 400 and infra red is above 700.
Frequency is inversely proportional to wavelength - blue light has a higher frequency than red light.
AbbeysDad
Fish Gatherer
Do 'regular' aquarium lights do anything? .....They illuminate the aquarium for viewing. The blue lights alone simulate moonlight for nighttime viewing and as @Byron points out, facilitate a surreal and more natural circadian rhythm.
For adequate plant growth we need the white and red LED's of sufficient intensity for the tank depth, water clarity, and the type of plants we have.
For adequate plant growth we need the white and red LED's of sufficient intensity for the tank depth, water clarity, and the type of plants we have.
AbbeysDad
Fish Gatherer
Oh you've got that oldfartitis too?!now I just need to remember his for next time, damn oldtimers disease
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