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Input wanted for final lighting layout

Mike_72

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Joined
Jun 12, 2017
Messages
161
I think I’ve finally decided how I want to do the lighting for my small garage. Dimensions are 18’x26‘ with 9.5‘ ceilings. I think I’ll do 9 two bulb t8 fixtures with bypassed ballasts for LED tubes. The tubes I’ve picked are 2200 lumen 18 watt, frosted and 5000k. This give me just under 40,000 lumens for 85 lumens per sqft. Each line of three lights that run the 26 foot direction will be on its own switch. The only thing I’m not too sure about is the position of two of the lights in relation to the garage door tracks. As you can see in the drawing two of the lights will be installed just a little inboard and above the tracks. Is this something I should be concerned about? I was thinking that having them inboard of the tracks would be better than outboard as it will cast the shadow out towards the wall where the man door is an not into the main working area of the garage. Anything else I should be considering?
 

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pbon

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May 14, 2017
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3,498
You could put the front 3 outside of the tracks (center one between the tracks) and even suspend them to just below the tracks if you are often working at night with the doors up.
 

Bert_

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Dec 24, 2016
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Location
NW Iowa
I would do a real lighting calculation. 85 lumens per square foot really doesn't mean anything.
 
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M

Mike_72

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Jun 12, 2017
Messages
161
Unfortunately I don’t have the software to do a full lighting analysis.
 
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GTO

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May 8, 2009
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NJ,FL
And you know these are garbage how?
I have these in my garage, they work fine . I doubt I will have to replace them in 10 years.......that is unless you have done a long term test
 

Don1357

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Apr 15, 2019
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948
Location
Palmer, AK
Unfortunately I don’t have the software to do a full lighting analysis.

I bought a 12 pack of 4ft LED lights. I plan on doing a full lighting analysis by hanging a bunch and seeing how it works when it is really dark outside. I'll follow up the study by hanging more or less, based on the results of the previous analysis.

Am I missing something? Does it really need to be more complicated than that?
 

Don1357

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Joined
Apr 15, 2019
Messages
948
Location
Palmer, AK
Why wouldn't you? You can run a simple calculation in 20 minutes. Why do guesswork when it's that easy?

Because guessing is 19 minutes faster and it is such a huge target that it is hard to miss. Your eyes do most of the work for you by adjusting to just about any light condition. It takes four times the amount of lumens to double the amount of light so it is hard to overshot it..
 
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