Re: [GSAS-Member] Bulb Life

["Clifford Miller" <clifford@clevergeek.com>]

Hi Shango,

I try to replace my "cool whites" annually, as they do become
significantly less effective for growing plants.

Some of this has to do with PAR wattage-- not all of the light in our
visible spectrum is usable to the plants (who mostly focus on red and
blue), so after a few years the light can still look really bright to us,
and do almost nothing for the plant.

That's why some of those "super plant lights" barely look on, but do well
with the plants.  I don't use them because they're so much more expensive
than regular bulbs (which also work well), but they demonstrate the point.

Have you stopped into the indoor sun shoppe?  In your neighborhood these
days I think, and a fun place to pick up interesting lighting tips. (and
overly expensive toys you don't need...)

Cliff


> I was suspicious of the bulb life but this is new to me.  Does it just
> decrease the wattage experienced by the plants OR is it a change in wave
> frequency OR both or More?
>
> Thanks so much for this knowledge.
>
>
> On 11/14/08 1:55 PM, "clayton anderson" <naturalart@earthlink.net> wrote:
>
>>
>> On Friday, November 14, 2008, at 12:00  PM,
>> gsas-member-request@thekrib.com wrote:
>>
>>> 4.5 watts per gallon with 2 year old bulbs
>>
>> Shango, if you haven't changed your bulbs in 2 years you dont have 4.5
>> watts/gal. anymore. That could effect/slow your vascular plant growth
>> and therefore allow the black hair algae to increase. You may or may
>> not know that, you cant completely get rid of any algae. All you can do
>> is manage it.
>>
>> Clay Anderson
>>
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>
> --
> Shango Los
>
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