Author Topic: IES LED strip  (Read 810 times)

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Offline dam

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IES LED strip
« on: May 21, 2019, 12:28:12 am »
Hello everybody,

We have a question concerning IES behaviour.
A company calculated and sent us IES file for LED strip.
Unfortunately, when we insert this file in Keyshot, the light is shown like a point, not like a line (the IES is based upon a 1 meter LED strip).
Do you have any solution to manage this kind od IES file?
Thanks a lot for your answer.

Online RRIS

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Re: IES LED strip
« Reply #1 on: May 21, 2019, 12:42:43 am »
Are you sure it's not a profile for a single LED?

Offline mattjgerard

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Re: IES LED strip
« Reply #2 on: May 21, 2019, 06:30:41 am »
Are you sure it's not a profile for a single LED?

That is now mine are. There are ways for the engineers to calculate for an entire fixture. But it gets really complicated as it has to take into effects the material that the light is traveling through. I've had good success with assigning the ies profile to a single led geometry and using the pattern tool to replicate the proper number of LED's. Worked pretty well.

Offline dam

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Re: IES LED strip
« Reply #3 on: May 27, 2019, 03:21:40 am »
Thanks for your answer.
RRIS : I'm sure it's a STRIP LED IES file because it works in DIALUX (which is a light simulator software).
mattjgerard : Does that mean that it's not possible to manage an IES strip LED in Keyshot? (only single sources)

Offline mattjgerard

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Re: IES LED strip
« Reply #4 on: May 28, 2019, 02:11:03 pm »
If the material is the same one across all the LED's in the unit, you can control them from the one material and that will change the light settings across the board for all of them simultaneously. Its how I do it.

Say I have a fixture with 20 leds, I set the material up on one LED, place that material on the rest of the leds, and then you can adjust all the LED's at the same time since they are all using the same material.

Then if you want to get fancy, change that material into a multi material, and then start creating color variants for the fixture. I have a single fixture that has 6500k, 3200k, 2700k, Red, Blue, Green, Amber, Magenta and Purple all in one material. Makes it super easy to manage and to pull in products to scenes when I need to throw something together quick

Offline dam

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Re: IES LED strip
« Reply #5 on: June 05, 2019, 03:30:14 am »
Thanks Mattjgerard,

I understand it's very easy to manage different light sources.
Unfortunately, my problem is to manage the IES file provided by a laboratory (based upon a real light source).

Offline mattjgerard

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Re: IES LED strip
« Reply #6 on: June 05, 2019, 07:13:29 am »
Thanks Mattjgerard,

I understand it's very easy to manage different light sources.
Unfortunately, my problem is to manage the IES file provided by a laboratory (based upon a real light source).

Unless I am mistaken I think the IES profile should include the shape, throw, color, and falloff of the entire fixture, if that's what they have calculated for the entire fixture, so it should be as simple as adding the profile to a shape and getting the position correct. Is the light being cast in the right shape (a line as you stated)? The light indicator in KS will just show the orange line with the ball at the end, I don't think it will outline the shape indicated in the ies profile. I would inquire with the people that supplied you with the ies profile and see if it was the spec for a single LED module within the fixture or the entire fixture as a whole.

I am interested in the as my lighting dept is going to be moving in the IES direction when providing specs on our website.