gpenelton

Turn Off Light Emissivity

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I am trying to create my first custom light fixture.  I have saved the fixture as a new electrical symbol, and have given it a light source value of 1200 lumens.  I have also assigned the light bulb portion of the fixture a "Lighting White" material, which gives it emissivity.

 

My question is, how do I get CA to turn off the emissivity when the light is turned off, similar to the stock CA pot fixtures shown in the attached screenshots?  Or is there a different way of creating the fixture?

 

Thanks in advance

Screenshot2.jpg

Screenshot.jpg

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There are two materials for "Lighting White" which can be used in light fixtures that you need to be turned on all the time or fixtures that are used in non defined rooms that need to be on in daylight conditions.  Then there is   "Default Glass (Lights): Lighting White"  found in  Material Defaults that will respond to the light being turned on or off as well as the Sunlight being toggled off.

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Posted (edited)

Thanks Chopsaw!  I still cannot get it to work however.  I have assigned the Lighting White material to the bulb, but it still remains emissive when the light is turned off.  What am I doing wrong?

Edited by gpenelton
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Can you post the plan?

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Emissive is independent of the light, it's a material setting that makes it seem as a light source. The only way to turn it off is to open up the light bulbs material DBX and reduce it or set it to zero.

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I'm afraid you lost me Graham. Are you saying that I can't have my light fixture react the same way as the stock CA fixtures?

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25 minutes ago, gpenelton said:

I'm afraid you lost me Graham. Are you saying that I can't have my light fixture react the same way as the stock CA fixtures?

He's saying emissivity isn't the way to control the lighting.

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24 minutes ago, gpenelton said:

I'm afraid you lost me Graham. Are you saying that I can't have my light fixture react the same way as the stock CA fixtures?

 

No, just that a materials emissive property is independent of the light, it does not turn on or off when you turn he light on or off. There are times when it may appear as such but that is because the light fixtures actual light source is reacting with the materials emissive setting.

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2 minutes ago, TheKitchenAbode said:

No, just that a materials emissive property is independent of the light, it does not turn on or off when you turn he light on or off. There are times when it may appear as such but that is because the light fixtures actual light source is reacting with the materials emissive setting.

 

Not so sure that is entirely true Graham, the Default Lighting White does behave differently than the Lighting White.

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16 minutes ago, Chopsaw said:

Give this a try,  Sorry I stepped out for a bit there.

 

image.thumb.png.2c0624c97c920b06eac6fb3c9da52a3b.png

 

Light Test Chopped.plan

 

That's it Chopsaw, Thanks.  My mistake was I was selecting the Lighting White from the Library Materials instead of the Material Defaults.

 

Thanks to everyone for their help.

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1 minute ago, Chopsaw said:

 

Not so sure that is entirely true Graham, the Default Lighting White does behave differently than the Lighting White.

 

Agree, there are a number of factors that will effect a materials emissive appearance/behavior. Color, transparency, texture and if the material itself is being additionally lit by another light source.

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48 minutes ago, gpenelton said:

Here you go Robert...

Light Test.plan

I've made some adjustments for your comparison.

1. adjust vertical offset

2. adjust light bulb material

3. adjusted vertical sizing

4. adjusted lighting of point light

5. added a 2nd light source, spot light.

Pendant Eglo Loncino.calibz

 

I forgot to turn of the emissivity of the light bulb material...oops.

image.thumb.png.9f27bb68ba850094f9178d77a35760f1.png

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1 hour ago, robdyck said:

I've made some adjustments for your comparison.

1. adjust vertical offset

2. adjust light bulb material

3. adjusted vertical sizing

4. adjusted lighting of point light

5. added a 2nd light source, spot light.

Pendant Eglo Loncino.calibz

 

I forgot to turn of the emissivity of the light bulb material...oops.

image.thumb.png.9f27bb68ba850094f9178d77a35760f1.png

 

Thanks Robert - I will have to play around some more.  Chopsaw actually solved the problem for me - see above.

 

Is it just me, or are there a lot of Canadians on this forum?  I'm from Winnipeg myself....

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Seems like there's more all the time! My in-laws live near Dauphin.

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