The current VRayLightMtl seems to be unitless, with a multiplier… How would I achieve (for example) the output of a 100watt bulb?
Per the online help…
If you know the photometric power of a self-illuminated object in lumens (e.g. 1700 lm for a 100-watt bulb) you can calculate the multiplier for VRayLightMtl if you divide the lumens by the surface area of the object in meters (the 3ds Max Measure utility can be used for this), provided that the self-illuminated color is pure white.