LED and Lumen Setting

[HoppyHopp]

Hey,
i try to build a LED-Channel. I know that the opal cover transmit about 55-60% of the light and the LED-Stripe has 300 lumen/meter.
But in the render looks more like a sun.
Did i something wrong?

[B.Y.O.B.]

Did you use reasonable tonemapper settings?

[HoppyHopp]

Did you use reasonable tonemapper settings?

I use always the default settings.

[HoppyHopp]

Is there any difference between Gain and Exposure in World->HDRI settings?

[B.Y.O.B.]

If you use real-world light units, you will also need to use real-world tonemapping units.
For a start, you could take a photo of a light source with similar brightness. Then check the ISO, F-Stop and shutter time chosen by the camera, switch the tonemapper to "camera settings", and enter similar values.

About gain and exposure:
final_gain = gain * (2^exposure)

So gain is a linear factor, while exposure is an exponential factor.

[HoppyHopp]

Thank you, so is this workflow right?

1. default settings



2. matching LED with tonemapping



3. matching HDRI with exposure setting to match the default setting brightness



4. result in a room looks right?

[CodeHD]

We had a thread before on this kind of topic:

viewtopic.php?f=4&t=1938&p=24448#p20979

perhaps you find some helpful info there?