This is GREAT news!
I would like to add a bit to the idea.
If we could have a list with all the emmiters and be able to change intensity to more than one at the same time (shift - click to add an emmiter from the list to the selection, control - click to subtract from the selection), to be able to numerically set the same value for the selected emmiters and to able to shift - drag the slider so that the selected emmiters' intensity changes analogically.
Like in Adobe illustrator when you have a CMYK color in the color palette, you can shift - drag the slider and all the colors change but keep the same analogy between them.
With this functionality, opposed to a one-at-a-time-editing you could setup a dome of emmiters, render and then setup intensities!
I guess we will be able to change even the light color very soon.
It is based on the same principal (I think).
Something like this:
