Too much actinic?

well i would think its bc the deeper in the ocean you get the more blue the water is. Deepwater acros are used to deeper blues then brighter whites. Thats my answer lmk how on or off i was lol

 

because blue light gets deeper than most other colours
reds I believe dont make it beyond a few metres, followed by other colours until only blue penetrates

so for really deep water algaes, blue light is all they know

Steve

 

Because doesn't the red light dissapate the deeper you go?


This is my knowlege of fishing lines - red lines claim to "disappear" in water deeper than 15"

 

My personal experience over 20 years

... good macro algae has grown better for me under flourescent lights in the more blue spectrum such as actinic.

... I've usually run 50% 'actinic' / 50% 'daylight' flourescents or maybe a bit more blue. Have never run 100% actinic.

... metal halides at 6,500k and 10,000k never gave me even close to the same level of success in growing the good macro algae (ceteris paribus). Not that they don't work, I'm speaking comparatively.

... on the other hand ... I haven't ever tried metal halides higher than 10,000k. And, my tanks have never been deeper than a couple of feet.

 

according to Einstein's wave particle theory, each photon of light has an energy. He states that the photons dont move as a beam but more as a wave, (thus the bending of light) therefore the wave can have both speed, and frequency. The speed is always the same, 3x10^6m/s... but the frequency of a photon can vary. The frequency most people can see is between about 300nanometers to about 800nanometers. The lower the frequency (nanomerters) the more energy the photon has and the farther it can travel. Thus ultraviolet light which is 300 and below penetrates even farther than blue light... and this is also why MH are the preferred lighting because zooxanthellae absorb the uv range also

 

they disappear because there are no "red" photons to reflect off of them that deep. they already lost all of their energy by that depth so they are virtually invisible because they absorb all other photons of color

 

But for the original question... do you have a link to this article, i would like to read it because the photosystem of all green colored plants/algae uses the a lot of different energy photons but will produce the most energy from the 500ish nm range, which correlates to the middle of the visible spectrum, or yellowish.
sorry for being such a nerd in the last few posts guys :/

 

Someone explain ROYGBIV and why the sky is blue.

 

Easy.

Blue light is the only type that gets down to the 40 feet and under club

Anyone that has ever dove before will know what I am speaking about.

 

I have seen PAR tests of pretty much every bulb made regardless of the type of bulb it is, and the higher Kelvin lights always have less PAR than a lower Kelvin bulb.
Sometimes the bulbs are labeled in a misleading fashion though. Ushio 14,000K halides have a lot of PAR, but if you look at the "color" of the light that bulb makes, it is in reality more like a 10,000k bulb.
Also, take t5ho bulbs for instance, an ATI aquablue (which is more of a white bulb, with a hint of blue) makes more PAR than an ATI Blue +, and that B+ is the best PAR making t5 blue bulb out there.