reef's = same requirements as pot ? - Page 3

Funky_Fish14 · #22 03-20-2010, 05:44 AM

Quote:

Originally Posted by justinl

as fas as I understand, it's not enough to just talk about red yellow blue etc light. When it comes to photosynthesis it's all about PAR (photosynthetically active radiation). Different processes involved in growth are triggered by specific wavelengths as well. For example in "sun plants" vertical growth is increased with greater far red to red light exposure. Absorption of the different wavelengths mediates phytochrome activity (which is associated with vertical growth, flowering, fruiting and a bunch of other things), but not photosynthesis.

On the topic of equipment, little of reefing equipment is novel. For example, plant growers were using halides and T5s long before we were.

Photosynthetically available radiation.

Buuut anyways, yes, interesting note about the phytochrome mediation. That makes more sense.

BlueAbyss · #23 03-20-2010, 06:10 AM

There are a number of different pigments involved in photosynthesis that each are excited at different wavelengths, even green. The old notion that green light is of no use to plants is actually wrong, there just isn't as wide an absorption band at that point in the visible light spectrum. That's why plants grow best under a relatively 'full spectrum' lighting that contains a fair amount from the entire 'active' spectrum. I'll bet plants grow great under RGBW LEDs. But yeah, justin your absolutely right... plants require light from most of the spectrum to perform well.

We rarely hide the... uh, implements, around here. There are not many 'fish people' around the area anymore, really, and none that are reef tank keepers. So anyone that visits here is pretty much okay with the bong sitting on the shelf.

Hmm, I'd always thought it was 'active radiation'. Thanks Chris!

fishytime · #24 03-20-2010, 02:33 PM

Quote:

Originally Posted by BlueAbyss

For effective flowering and fruiting, plants need a fair amount of the red spectrum that is lacking in higher K bulbs (part of the reason those bulbs generally rate lower in PAR), which is why AgroSun bulbs have become popular for indoor growers who grow flowering / fruiting plants...

thats what fiji purples are for

BlueAbyss · #25 03-21-2010, 03:34 AM

Nice to hear from a T5 guy

I'm really tempted...

Funky_Fish14 · #26 03-21-2010, 05:47 AM

Quote:

Originally Posted by BlueAbyss

The old notion that green light is of no use to plants is actually wrong, there just isn't as wide an absorption band at that point in the visible light spectrum.

Hey I never said green was of no use, just for spinach chlorophlasts in photocells I and II, the green light is not used as much for photosynthesis, but im sure like you guys said it is used for other photo-regulated processes!