Blackout

A near invisible Magical aura surges outward from you weakening all sources of light in a 100ft radius to a insignificant dying glow, bringing everything to pitch black. A creature with darkvision has difficulty seeing (perception disadvantage) for 6 seconds as their eyes adjust, with all new sources of non-magical light failling to start during the spell duration.

 The user of the spell can see as if they were not under the spell's effect, and at higher upcast levels, they may select 1 additional creature to not be impacted by the spell's vision debilatation, per spell level upcast. 

If any of this spell's area overlaps with an area of light created by a spell of same cast level or lower, the spell casting the light is dispelled. If the spell casting the light is higher level, the radius of the light from the spell is only half as effective in area, (reach) of light.

For each spellslot it is cast above, the spell gains an additional 100ft in area, capping at 200ft. (i.e. at 2nd level the area is 200 ft for a duration of 3 minutes)
If cast at 3rd level or above, magical darkvision on all other creatures except the ones selected is negated for the spell's duration.