I'm home sniffing and dripping and feeling annoying, so I'm sorry about the dumb questions. In the LuxRender wiki on rendering, it says something about:

"First, keep reflectance (i.e. brightness) in diffuse components of your materials below 0.8 or so. While this will not affect rendering speed directly, your image will de-noise much faster. On the same note, avoid using specular colors higher than .25 or so, and reflection color on glass and metal materials should be kept below .8 as well. If this makes your scene too dim, simply adjust the tonemapping to expose it more."

Okay, so is this .25 meant to be the value in Specular_Value?

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

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