Quote Originally Posted by DreadedHermie
For that, I believe, I need the perfect spectrum (see image).

If you like that spectral distribution just get yourself an HPS and be done with it.

What I mean is it is not all red and blue that is important. Green for example is for 80% absorbed by the plant. I will base my spectrum on the results of this study: Fotosynthese-efficiency bij verschillende golflengten (www.narcis.info) that should improve McCree's old research in every aspect (not out yet). Most of the 175.000 scientific studies you can find there are available in English by the way.

I have worked with HPS for over 20 years now and know how that is.

The phycoerythrin is what makes the nice cristals and serves as a light harvesting antenna.

Phycoerythrin is implicated in the light absorption of red algae, which is really hard to keep lit. If you've got relevant data about phycoerythrin's role in trichome production, help a brother out and cite a reference. But don't ad lib, please.

Sorry, I'll think of that next time. Just like it isn't all about red and blue it isn't all about trichomes either. Phycoerythrin has a function and in algae that is of harvesting light; it transfers energy to chlorophylls.
Have you ever noticed when and how exactly you get the christals?

Different energy results in different chemistry. I have no idea, but that must be right.

Well, that statement clears everything up. :

If that isn't so at least explain why, I am here to learn.

Many experiments have shown the so called Emerson effect adds about 25% to your harvest. To create that I want to leave the far reds on for 2 extra hours.

The Emerson Effect was described over 50 years ago. It describes how multiple wavelengths applied concurrently have a combined effect greater than the effect of the sum of the individual component wavelengths. The phenomenon I believe you're referring to is currently being called "martian nights," (red, get it?) and is being investigated by some knowledgeable folks on this board. Search that term and you may find what you're looking for.

May be I used the words wrong, but without far reds you simply get 20% less yield. That is proven in so many studies I consider that common knowledge. If the Martian method adds another 25% I better try that too.

I found all the leds I need to build a 300 watt lamp.
Now I have to try to be patient :jointsmile::stoned:imp::rastasmoke::smokin: and wait for that research that was supposed to be finished by now.