Can I change the wattage of a light in nodes? I recently found out that you can change the temperature of a bulb using a black body node, but it would be super helpful to be able to set the bulbs strength in nodes too. Is this a feature in Blender?
The emission strength is a multiplier to the power in watts.
Example:


So, in theory we can change this:

into this:

and it appears to work perfectly.