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Brightness levels ETC HPL 575 vs S4WRD led kit

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Tim Weaver:
I want to convert some of my S4's to full color LED using the S4WRD II cap. The question I can't seem to get an answer to is how does the brightness compare to a standard 575 White vs White?

I'm sure the saturated Colors would be brighter with the LED, but what about white vs white?

Rick Earl:

--- Quote from: Tim Weaver on October 22, 2023, 12:52:33 PM ---I want to convert some of my S4's to full color LED using the S4WRD II cap. The question I can't seem to get an answer to is how does the brightness compare to a standard 575 White vs White?

I'm sure the saturated Colors would be brighter with the LED, but what about white vs white?

--- End quote ---

There is an APP for that: https://www.etcconnect.com/Support/Apps/Lighting-Fixtures.aspx

CRI on the color is lower than the CRI on the White light version, so it depends on what you're wanting to light.

Rob Timmerman:

--- Quote from: Tim Weaver on October 22, 2023, 12:52:33 PM ---I want to convert some of my S4's to full color LED using the S4WRD II cap. The question I can't seem to get an answer to is how does the brightness compare to a standard 575 White vs White?

I'm sure the saturated Colors would be brighter with the LED, but what about white vs white?

--- End quote ---

ETC provides full photometric data on their website, but compared to the 575W lamp, the color version of the S4WRD II has about 50-60% of the output at 3200K, with color rendering that should be at least acceptable.  The white-only version of the S4WRD II sits between the 575W and 750W lamps for output (with the high-CRI version being closer to a 575W lamp and the lower-CRI version being closer to a 750W lamp).  The differences do vary with lens tubes, and the beam profiles are not identical, so if you need more than just total output numbers, you'll want to go through the actual photometry files.

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