Re: Staggered lighting, was (Re: [APD] Amano's AGA demo)

[Jeffery Ludwig <jeff at rockytop_net>]

> Is there consensus on photoperiod these days? 12? 16? does
> it matter?

I have not seen any quantitative data to suggest one over the other (or 
even a total photoperiod duration) and unfortunately it would cost quite 
a bit of money and room to test.  To sustain the "blast" you would 
definately need CO2, so we're talking two high tech tanks, then you 
would need two identical lighting rigs, each with two ballasts (so four 
ballasts total) as simply using bulb wattages is a bad idea for a 
controlled comparison (ballast<->light interactions).  You could use one 
setup and stagger in time but then theres substrate aging issues, maybe 
you could run a A B B A (not the band, the experimental design) type 
experiment, measuring plant dry mass starting with a certain number of 
plant "inches" from a fast grower...?

Then after you do all this someone on the list will claim that the 
benefit they are seeing is species specific, and it wasn't the one you 
used :) Some data would be better than none however.

Jeff Ludwig
Elkton, MD
http://www.rockytop.net/
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