There’s no built-in photometric function but you can sort of fake your own.
Maybe something like this - when you want to sample light intensity, do a sphere trace at the location and search for lights. For each one you find, do a line trace from the location to the light. If the light is not occluded, get the light brightness and distance from the point. You’re going to have to make up your own math for this, but this information can help you figure out how intense light SHOULD be under normal conditions.