Re: [GSAS-Member] Catalina T5HO fixture report; photoperiod?

[Susan Welenofsky <welenofsky@comcast.net>]

You have a really big aquarium. I would try ten hours.

Susan


On Dec 27, 2009, at 7:33 PM, Matt Staroscik wrote:

> 216W @ 6700K
> 
> 
> On Sun, Dec 27, 2009 at 6:55 PM, Susan Welenofsky 
> <welenofsky@comcast.net>wrote:
> 
>> How many watts and what K?
>> 
>> Susan
>> 
>> On Dec 27, 2009, at 1:36 PM, Matt Staroscik wrote:
>> 
>>> The Catalina T5HO light fixture that I ordered arrived, and it is indeed
>>> very nice. It seems solidly constructed, has 2 switches so you can run it
>> at
>>> half or full power, and has individual reflectors for each bulb. At less
>>> than $200 shipped with bulbs of your choice, it seems like a heck of a
>> deal
>>> for a 48" HO fixture. There's no way to know what kind of parts are used
>>> inside but these fixtures have a good reputation so I am optimistic. It
>> also
>>> included legs though I don't plan to use them.
>>> 
>>> This fixture does indeed direct a lot more light down in to the tank, so
>> I
>>> will probably have to get a second timer and adjust the photoperiod for a
>>> burst of mid-day full power.
>>> 
>>> For a heavily planted non-CO2 tank that is almost 24" deep, what
>> photoperiod
>>> would you plant guys recommend? I have seen everything from 6 to 14 hours
>>> being used. I am thinking about 10 hours, with 5 hours of full power...
>> but
>>> I really have no idea. Previously, I ran 12 hours full power, where full
>>> power was somewhat less than full power in the new fixture.
>>> 
>>> If/when I add CO2 I assume I will want a longer/brighter photoperiod
>> since
>>> the plants will want to grow faster? Up to 12 hours, with 6 at full
>> power?
>>> 
>>> The plants I have all require "low to moderate" light, btw... Crypts,
>>> swords, hairgrass, assorted bunches of stem plants.
>>> 
>>> Thanks for any ideas...
>>> 
>>> MS
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>> 
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