Hello,
In Blender 2.8 we have fixed units that allow users to define units for rotation, length, mass and time. But what about lights? Eevee’s “energy” and Cycles’s “strength” are still unclear and confusing Blender units.
It’s really difficult to convert real world units from other software (e.g. watts in three.js) to something vague like “strength” in Blender.