LumenLights allows you to set the brightness of your lights using either Lumens or Watts + Lumens Per Watt. Although the limitations of both real time lighting and the Range + Intensity setup of Unity lights prevent the highest degrees of realism, you can see from the screenshots comparing LumenLights with prerendered reference shots that it gets pretty close.
Having appropriate ranges and intensities that model real world lights will add a greater level of realism to your level designs and aid Archvis developers in creating realistic scenes more quickly.
In addition to setting the intensity and range of the lights, you can select from a drop down of predefined lamp types to set the color temperature of your lamps to match real world values. There is also a white balance adjustment to further tune in your scene
At the current time, LumenLights works only with Point and Spot lights, in both baked and real time modes.