I am important for flight,
my anagram will affect your sunlight.
My abbreviation is used to modify,
else you would not be able to write Phi.
What am I?
Could it be
Altitude? It's important for flight,
It's an anagram for
"Latitude" which affects the length of the day ie. sunlight
Its abbreviation
"Alt" like alter or alt on a keyboard.
Not sure about this-
but perhaps Phi is a reference to Geopotential Height which is represented by the greek letter Phi. It could also be that in order to create the letter phi on the computer, you need to press ALT-232 (uppercase) or ALT-237 (lowercase).
This is probably not correct, but it could be a
stop
I am important for flight,
Well, it's important for a flight to stop. If you don't believe me, listen to George Carlin :D
my anagram will affect your sunlight.
a spot? Maybe on glasses or on your eye, god forbid
My abbreviation is used to modify,
s.t. - "such that"
else you would not be able to write Phi.
Nope... I got nothing.
Also probably not correct, but
Lifter
I am important for flight,
Lifters sound important to fly. Wonder if there is such a thing.
my anagram will affect your sunlight.
Filter
My abbreviation is used to modify,
the L you say?
else you would not be able to write Phi.
well a lowercase l could be the line in ϕ