Re: Rewiring a ballast. Help needed.
From: Sean (Seanold_at_onelink.ca)
Date: 03/15/05
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Date: Tue, 15 Mar 2005 06:32:03 GMT
Actually that's a pretty good idea to replace the dead ones in one area with
good 4' lamps, and rearrange the rest of the 8' to make that area look
decent.
Thanks!
<bigcat@meeow.co.uk> wrote in message
news:1110812612.875391.102770@g14g2000cwa.googlegroups.com...
> Sean wrote:
>> One other question while on the topic of replacing ballasts and
> fluorescent
>> lights....
>> I am remodelling an empty unit to make a bookstore and they currently
> have
>> about fifteen to twenty 8 foot double tube lights throughout the
> store. (The
>> store is about 2500 square feet.)
>> I am considering replacing them all with about 50% more 4 foot units.
> (So
>> about 22 - 30 units.)
>
> Here, Britain, 8' tubes are mostly 125w, with some being 100w.
> Presumably youve got 60w 8'. Basically the longer the tube, the better
> the efficiency.
>
>
>> I am considering doing this mostly due to the high price of 8' tubes
> and
>> ballasts.
>
> ... you have all the 8' ballasts already, no extra spend needed. Re
> tubes, they last long enough for there to be no hurry, if you have
> anough that work now.
>
>
>> (In this part of Canada the 4' tubes go for about $1.40, while the
>> 8' go for about $6-$7). Also the ballasts for the 8' bulbs costs
> about $30,
>> whereas I can get a whole 4' unit for about that price. ($20 for a
> cheaper
>> one that will probably break down in a few years, $30 - $35 for one
> that
>> will hopefully last.)
>> So there are actually two questions:
>
>> 1) Will I retain a similar amount of light from replacing those
> units? (I
>> know that their will be a small drop in light, but I just wanted to
> know how
>> noticeable it would be? Or should I just double the number of 8'
> units and
>> achieve near the same amount of light?)
>
>> 2) Is it going to be cost effective over 10 -15 years to replace all
> these
>> units? (Or am I wasting a lot of money trying to avoid spending $6 -
> $7 on
>> the 8' tubes and $30 on a few new ballasts to replace the 3 or 4 that
> are
>> burnt out?)
>
> Thats the impression I get, but do the numbers. What does it cost you
> to fix he few 8'ers and provide tubes, what does it cost for 4'...
>
> I'd look at just replacing a small number with 4', just as needed, but
> do it in one area to ensuer it looks decent, using the good 8' lamps in
> that area to repair or replace the dead ones elsewhere.
>
>
> NT
>
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