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  1. Replies
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    Just out of curiosity why do you need a CRI in...

    Just out of curiosity why do you need a CRI in excess of 90? Or is it just something you want?
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    The company that installed our security system...

    The company that installed our security system told me that the fine sawdust would be a problem for a smoke sensor and recommended a heat sensor. We went with that and haven't had any problems. The...
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    I don't think you are missing anything, Mark. ...

    I don't think you are missing anything, Mark. That type of fixture is pretty inefficient for lighting a workshop. There are many better choices - strips if you have light colored ceilings, or...
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    How many lamps per fixture, Mark? If you are...

    How many lamps per fixture, Mark? If you are using 2 lamp fixtures with 2800 to 3000 lumen lamps you should have somewhere in the range of 80 to 90 footcandles maintained. I normally recommend 100...
  5. [QUOTE=Greg R Bradley;2568610]Yes, "brighter than...

    [QUOTE=Greg R Bradley;2568610]Yes, "brighter than the sun" is badly misleading.

    If you look at the lighting displays at the consumer stores like HD and Lowes, you are mostly looking AT the light,...
  6. Jon - The article was written specifically for...

    Jon - The article was written specifically for luminaires utilizing fluorescent sources and is not intended to apply to luminaires using LED's. This is explained in the second and third paragraphs...
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    The flat paint will provide a more uniform light...

    The flat paint will provide a more uniform light distribution. That said, the choice of paint is yours.
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    I think you've answered your question, Mark. ...

    I think you've answered your question, Mark. Three rows of six two lamp T-8 fixtures per row, spaced as you have indicated sounds about right based on the parameters you have described. Be sure to...
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    Have you read my Article on shop lighting? It...

    Have you read my Article on shop lighting? It answers your question.
  10. New Submission It depends on the color of your walls and...

    It depends on the color of your walls and ceiling, and the type of fixture you install. If the room surfaces are a highly reflective matte white color you will probably get 40% to 50% of the lamp...
  11. New Submission Joel, I'm having difficulty envisioning what you...

    Joel, I'm having difficulty envisioning what you propose. Can you post a drawing showing the floor plan with the proposed fixture locations and all dimensions? If not I'll pm you my mailing address...
  12. New Submission I'm a little confused, Joel, about the dimensions...

    I'm a little confused, Joel, about the dimensions of your space. In your earlier post (June '14) you described two areas totaling 456 sq ft and now they total 263 sq ft. Is this the same space or...
  13. New Submission No Neil, the fixtures do not need to be mounted...

    No Neil, the fixtures do not need to be mounted in continuous rows. They can and frequently are mounted individually. The explanation is lengthy so if you want to pm me a mailing address I'll send...
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    The plastic tube guards should work, or you could...

    The plastic tube guards should work, or you could try to find fixtures with a protective wire cage below the lamps. You will probably have to go to a lighting distributor to find them, though.
    ...
  15. New Submission Hi John, sorry for the delay in responding. Iíve...

    Hi John, sorry for the delay in responding. Iíve not been on the forum for a couple of days.
    Youíve raised several questions that Iíll try to answer.

    First, with regard to the orientation of...
  16. New Submission You're welcome, Judi, I appreciate your feedback....

    You're welcome, Judi, I appreciate your feedback. Glad it was of help.
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    A couple of thoughts. Fluorescent lamps are...

    A couple of thoughts. Fluorescent lamps are temperature sensitive and cold air blowing across the lamps (like from a nearby air conditioning register) can cause the problem. Another possible cause...
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    I think you are on the right track but suggest...

    I think you are on the right track but suggest you read my article on "Lighting the Small Workshop". It's the first one under the "Articles" heading. I believe it will answer your questions and...
  19. New Submission Sorry for the delay in responding, Joel, I've...

    Sorry for the delay in responding, Joel, I've been off the forum for a couple of days. If I understand your shop correctly you have two areas, one approximately 13.5 feet by 21.5 feet (289 sq ft)...
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    Tanning results from exposure to specific...

    Tanning results from exposure to specific wavelengths of radiation in the ultraviolet region. While these wavelengths are generated within the lamp they are blocked by the glass envelope so they are...
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    That's lamps, Gilbert. But once again, I don't...

    That's lamps, Gilbert. But once again, I don't recommend T5HO's on a 9' ceiling. T8's are a better choice. You would need 32 two lamp fixtures for that option.
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    Gilbert - I don't recommend T5 HO's for a 9'...

    Gilbert - I don't recommend T5 HO's for a 9' ceiling. Those lamps are very bright and I expect that most people would find them objectionable in terms of direct glare, as discussed in my article. ...
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    Gilbert - I responded to your questions via...

    Gilbert - I responded to your questions via private message since that is how you posted them. We can continue that way if you prefer, or we can post them in this thread on the forum. That way it...
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    David Wong is right on target with his comments...

    David Wong is right on target with his comments on recessed downlights for your shop. I suggest, as David did, that you read my article on shop lighting. Then I'll be happy to answer any questions...
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    Why not suspend T8 strips or industrials from the...

    Why not suspend T8 strips or industrials from the ceiling to put them in a plane even with the bottoms of the beams?
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