That's it. Of course you can save the settings so you don't have to do it each time. Or there are a lot of really good emssive shaders out there which basically control the settings for you.

The main ones I fiddle with are Emission color Emission Temperature Two Sided Light on Luminace Luminance Units (I set it to Kcdm2, It defaults to cdm2

Here's the sign in the set where I changed the values of three letters.