This uses a reversed variant of Obscure that reduces penalties instead of adding to them.

This is a Wizard's Guild restricted spell. Members may learn it at no cost.

Obscure (Vision, Reversed) 10 [24] 
    Extended (Infravision) [+20%] 
    Extended (Ultravision) [+20%] 
    Ranged [+40%] 
    Work on Anything Other than Darkness [-20%] 
    Magical [-10%] 
    Spell Components [-30%] 
        Must say "clear" in Latin 
        Must gesture with hands 
        Must hold a shard of clear glass 
Level 2 [38] 
    Add Extended Duration (x3) [+20%] 
    Add Area Effect (4 yard radius) [+50%] 
        Adds to built-in 2 yard radius 
Levels 3-6 [52/66/80/94] 
    Increase Extended Duration by 1 step [+20%] 
    Increase Area Effect by 1 step [+50%]