Ah, well for the night, get Uber Light Map tool, you can find it in the file forums > Utilities. Once you have that you just open it, open the map, and turn the lightness way down to where you like it. You also may want to null out the sun, to do that, open dothalo or any other halo modding app, goto the scnr tag then goto the one tag there, then let it load, in dependcies there should be one that is a lens and it should contain earthcity_sun something like that. Swap it to null.
For the nuke goto the jpt! tag and scroll down to something to the extent of rocket_explosion and up whatever range and hurt values you see to your liking.
For the big Rocket, goto entity and the rocket model, it should be labeled rocket, and its the mode tag, then goto tools>plugins>model resizer, resize to your liking.
My real name is a Mammoth, if someone who cares sees this, please change my name to a Mammoth