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From: Al Wootten <awootten at NRAO.EDU>
Subject: Re: Grow Lights
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Hi Jim

That has been my operating assumption.  However, an orchid growing friend
told me that output declines dramatically over lifetime and suggested
a yearly replacement.  Mine doesn't burn in the summer so I have taken th=is
as a two year recommendation.

I wish my ancient photography light meter were still operational--I had
it calibrated for footcandles...you'd think an observational astronomer
could do better at calibrating light flux.

Clear skies,
Al
+----------------------------------------------------------+
|Al Wootten, Slacktide, Sturgeon Creek at the Rappahannock |
|Astronomer (http://www.cv.nrao.edu/~awootten/)            |
|NoWorkAllPlay homepage  http://members.tripod.com/~astral |
|Deltaville, Virginia 23043                                |
+----------------------------------------------------------+


Jim McClements, Dover, DE z6 writes:
>
> In a message dated 1/17/06 10:05:11 AM, awootten at NRAO.EDU writes:
>
>
> > How often should one replace the fluorescent light bulbs?
> >
>
> "when they burn out" has always seemed logical to me.
>
> Jim
>
>
>
> Jim McClements
> 50 S. Prestwick Ct.
> Dover, Delaware 19904, USA
> Zone 7a
> 302-734-2836