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I think you gave the answer yourself. to be efficient in harvesting as much energy as possible from the light that hits them, plants(and algae) also need to absorb the light that is the hardest to adsorb. Because the intelligence of nature(evolution), they have found ways to do so. So like...

I did not say you need full spectrum. I only said it seems to be preferable compared to only blue and red. RGB is by no means full spectrum and still grows very nice plants. For me any ordinary white LED is full spectrum enough (although they usually have very little violets, deep blues, cyan...

yes you are right. But there are some remarks to be made, (note I'm just a hobbyist so by no means an expert) Firstly plant growth is often looked at as the result of photosynthesis and therefor there is a focus on the absorption spectra of chlorophyll a and b. That does not take carotenoids in...

Well the proteins in plants and algae are not all exactly the same, Chlorophyll A is universal but the other types of chlorophyll are not. Phycobilisomes and the proteins they are made of are restricted to certain types of algae and cyanobacteria. Other chemicals like carotene and xanthophyll...

Many types of algae can use green light, Rhodophyta en Cyanobacteria have phycobilisomes to catch that part of the spectrum. That is why they don't appear to be green. If you change your lightning algae usually appear, but with proper maintenance (cleaning the algae away) and care...

for every inch you move away from the source, light gets spread over a larger surface so intensity drops. A smaller beam angle limits this effect, so spotlights are the way to go for tall tanks imo. Kessil makes very nice ones, of course they are not cheap.

If the specifications that Fluval provides are correct, then yes those would give you (more then) enough light for your plants.

I think this is a bit optimistic, (not necessarily wrong) 1. A standard T5HO would give PAR-readings around 82 at 10" and 11 at 26". So only with reflectors that narrow the beam angle down to 120 degrees or less, you get the results as mentioned above. 2. In an aquarium some light will be...

I did, some time ago, TMC responded quickly and told me to contact the Dutch distributor, I did but unfortunately no reaction. I heard from a friend that she got a shop owner to send her broken LED back to the distributor and it took them nearly a month to send it somewhere it could be made...

there are 20 LEDs and only 8 are still emitting light. that's not enough to cover the tank.

Hi guys, ( and girls) Does anyone have a reasonable priced suggestion for a LED unit that could replace my 2 TMC tiles? There are dozens of aquariumLEDs these days, I'm not sure where to look for... Hope you can help me out ;-)