[RE-wrenches] Wood shop lighting

[Travis Creswell]

Continuous rows of four 4’ lamp T-8 fixtures (8’ long) on 8’-12’ centers
would be the ideal lighting system in terms of performance, efficiency,
installed price and maintenance cost.  T-5’s are actually slightly less
efficient and really don’t make sense at mounting heights less then 20’.
Plus T-5 lose more light output then T-8 as temperatures decrease which
starts to become noticeable at 60f and really noticeable at 50f.  Most shops
are kept warm unless they are being used and on the colder days it could
take hours for the T-5 lights to get to full output.

 

I suggest continuous rows because that gives the owner a very uniformly lit
space and tons of flexibility when he decides to reconfigure the shop in the
future.  “I can’t put this machine over there because that’s the dark
corner”.  The fewer the fixtures the worse the shadows which are a bad thing
in work shops and continuous rows are essentially shadow free.  For energy
purposes I would switch every other fixture for times when not as much light
is needed.  IE; 42’ long shop/8’ long fixtures = 5 fixtures per row with 1’
gap on each end of the row, 3 fixtures per row on one switch and two on the
other.  I would suggest the basic commodity grade 8’ white painted fixture
that every electrical supplier stocks plenty of.  Typical cost is $40-$45
each.  No need for hoods (reflectors) at the heights you mention especially
if the ceiling is white.  5000k 800 series lamps are the best lamp for this
application.   F32T8SPX50 would be the GE part number and your local
supplier can easily cross that with what ever brand they carry.

 

Best,

Travis Creswell

Ozark Energy Services

 

 

   _____  

From: re-wrenches-bounces at lists.re-wrenches.org
[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Jeff
Wongstrom/ Sarah Anderson
Sent: Saturday, December 06, 2008 9:58 AM
To: RE-wrenches
Subject: [RE-wrenches] Wood shop lighting

 

Hello Wrenches,

 

We have a client with an off grid wood shop and would like your
recommendations for the most efficient lighting options.  The shop is
powered by a quad stack, 4.8KW of PV and a 20KW genset.  The main part of
the shop is 42'x22' with ceiling heights varying from 10-12', there are
benches along two walls, and machinery work stations at several locations.
There is good day lighting and we have stressed the importance of light
colored surfaces.  We have had both T8 and T5 florescent lights with
electronic ballasts recommended.  From numbers that the electrical
wholesaler provided, the watts/lumen between T5's and T8's appear to be
similar.   However, the T5's are more expensive and have higher maintenance
costs but may require fewer fixtures.   Is one more appropriate than the
other or are there better, more efficient, wood shop lighting options?  

 

Jeff

 

 

 

Thirsty Lake Solar

PO Box 538

Eureka, MT 59917

Jeff Wongstrom

NABCEP Certified Solar Installer

406-889-5324

HYPERLINK "http://www.thirstylakesolar.com/"thirstylakesolar.com

 

 

 


No virus found in this incoming message.
Checked by AVG.
Version: 7.5.552 / Virus Database: 270.9.15 - Release Date: 12/5/2008 12:00
AM



No virus found in this outgoing message.
Checked by AVG. 
Version: 7.5.552 / Virus Database: 270.9.15 - Release Date: 12/5/2008 12:00
AM
 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20081206/a571022b/attachment-0003.html>