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Thread: Lighting Family - Face Host, Adding multiple light sources, Best Practices

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    Lighting Family - Face Host, Adding multiple light sources, Best Practices

    Hi All
    I work for a lighting company and am in the process of creating one of our systems in Revit. (Note: this is the first time I have used Revit)

    Q1 = Answered) All the customers I have spoke to with regards to what their requirements are before I start creating family's have said make it Face Hosted. I have looked at the template list and I don’t have a Lighting template that is Face hosted. I have Ceiling Host, Wall Host and No Host. So I downloaded a Philips file and removed there geometry and added mine as their family is lighting and Face hosted. How do I get a lighting fixture template that is face hosted? Have they made this template themselves? Or am I blind?

    Q2) For this system a few of the products/options require multiple light sources (IES). How would I go about doing this? From what I have read I would need to nest a family holding the two light sources into this family but my question is can I switch from one light source to two and can I manage there positions e.g. re-size and reposition the centres? Would this just be a matter of adding a visibility parameter to the nested family and create another which has just one light source?

    Q3) I think I have attached the file and would be grateful if someone would look at this and comment on whether the way I have done it is OK (best practice) or would there have been a better/easier way of doing this?

    Thanks
    Attached Files Attached Files
    Last edited by Orbik; December 16th, 2013 at 07:12 PM.

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    Moderator cellophane's Avatar
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    To make a Face hosted light, start with the Generic Model Face Based template and change the category to lighting fixture. From there the family creation method is the same.

    Multiple light sources will need to be nested families, although in this particular case I don't know all the ins and outs of how they work (i don't make many lights)
    cganiere likes this.

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    Easy as that I was stuck on that for ages.
    Thank you cellophane that's wrapped that question up :-)

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    did you figure it out about Q2?

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    Quote Originally Posted by BIM_grl View Post
    did you figure it out about Q2?
    No not as a definitive, but then I haven't really looked since I asked. It seemed none of our clients are really interested in the photometric files as they do all photometric calculations in Dialux or Relux. I guess when someone wants to do a render it would benefit.
    From memory what I learnt is you make a family with just the light source and bring that into your main family multiple times.
    Hope it helps
    If you find the way let me know :-)

    Hope it helps

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    I agree. I've done it the same as you, nested into other families. And created another family without light source for 'OFF instance'.
    Thank you for reply.

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    Quote Originally Posted by Orbik View Post
    photometric files
    Word of caution on IES files. They are typically only produced for one size per fixture (typically 48" for linear). If you have a different size fixture that doesn't have an associated IES file (which is most of them) you're back to using the built-in Light Source for renderings. For me, I'd rather have a consistent user experience than a few lights one way with the most another.

    For lights that I re-work I use multiple copies of nested families. Each nested family has as many types as there are options for light power/color in the fixture. The change in power/color is controlled by a Family Type parameter and the whole thing is loaded via a Type Catalog. Takes time to setup but worth it if you don't have the IES files you need.

    I don't know how this impacts photometric calcs but that's not my primary concern.

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