shop lighting
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Senior User
Joined: May 2004
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From: Northwest Indiana
i definately want to use the 8ft. those 110 watt fixtures were very bright. i think if i run 2 rows evenly spaced with 6 per row i should be good. now all i need is some $$$$$$$
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Originally Posted by Aftrmidnite
I'd price the 8 foot replacement lamps verses the 4 foot ones before you buy. There maybe a large price difference.
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Joined: Jan 2004
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From: Franklin, GA
Just a little info provided from a study that a textile manufacturer I used to work for did: The optimum height for florescent fixtures to be most efficient is nine feet from finished floor. This is for eight foot, double tube fixtures with the curved reflection pans installed.
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Originally Posted by maverick man
in a 30 x 60 building it would take alot of lamps to light up that area, plus the 8ft are commerical quality and are built to last longer....
With 8' 2-lamp strips, you can get about 72 foot candle average w/ 12 fixtures in a 3x4 pattern at the previously mentioned 9' height. Bump it up to 12' and the levels drop down to about 65 fc. 2304 watts total.
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From: BC, Canada
Independent of how many fixtures you use is the question of which bulbs you use in them. I had normal warm whites (4 footers) rated at 34w originally but they just didn't cut it. I tried the cool whites which were marginally better. Then I went to the more expensive 40w (non energy saving) high intensity "daylight" bulbs which made a huge difference. In the garage I'm more concerned with being able to see as opposed to saving money so in my mind it was worth it, "see" my point? :-)
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Joined: Oct 2004
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Originally Posted by 460f250
Independent of how many fixtures you use is the question of which bulbs you use in them. I had normal warm whites (4 footers) rated at 34w originally but they just didn't cut it. I tried the cool whites which were marginally better. Then I went to the more expensive 40w (non energy saving) high intensity "daylight" bulbs which made a huge difference. In the garage I'm more concerned with being able to see as opposed to saving money so in my mind it was worth it, "see" my point? :-)
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Senior User
Joined: May 2004
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From: Northwest Indiana
i'm looking at the 110 watt commerical high output cold start 8 ft fixtures. i think those will definately outperform the smaller ones. that would make a big difference on the light pattern also...
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Joined: Oct 2004
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Originally Posted by maverick man
i'm looking at the 110 watt commerical high output cold start 8 ft fixtures. i think those will definately outperform the smaller ones. that would make a big difference on the light pattern also...
My calculations above were done with a 3 row layout, 10'x14' on center. Depending on how high you mount them and the reflectances of your ceiling, walls and floor, you'll get a lot of light.
I would strongly recommend tube-sleave guards as well.
