Proper S-Value Max setting in Lightburn 1.4 for Longer Ray5 10W

When I purchased my laser and downloaded the LightBurn software, version 1.4, my laser did not seem to be cutting very powerfully. I contacted Longer support and they indicated that I should set my S-value max at 1000. When I did, everything I engraved seem to be too powerful and dark, burning a lot of wood material. So I scaled it down to 550. Seems to work, but is there a specific setting for the S value max for this particular 10W laser?