After spending a lot of time with LWF, trying to get good results & and wondering if LWF was just another way to disrupt the workflow. I have just had an alternative idea...
Instead of reducing all the materials RGB Values to 0.255, I just tried reducing the main direct light power to 0.255, and the GI skylight multiplier to 0.255, so changing 2 values instead of hundreds.
Turned on the srgb, in the vfb, altered the exposure +1 stop, and tweaked the curves and Hey Presto the results looked ok, It was a real simple scene, so cant be too sure if its exactly the same results as the long drawn-out LWF method.. I can be damned if I am going to convert the scenes rgb values back to 1.0 without an automated script to test it out on a complex scene.
But in theory lights with such a low power as 0.255 should render quicker than lights with power set at 1.0.
Can anyone else out there test this on thier standard setup files and post results & opinions