Hehehe... I was just having fun, poking holes in your story
As for the difference between FUL and OH IR RA... In DM the difference is obvious, OH IR RA only lights where you are, FUL lights the party itself... the definitions of the runes actually explains it:
FUL (fire) merely summons fire itself, DM portrayed this as "light". You could say the caster themselves are emitting light.
OH IR RA (air + motion + light) the air is pushed outwards from the caster's CURRENT location, and energised until bright.
Now here are my D&D definitions...
My D&D equivilent of FUL: a miniture fireball that hovers above the caster's head, on the end of a staff, etc. that slowly shrinks.
Spell radius: 5ft per spell level
Duration: 5 minutes per spell level
My D&D equivilent of OH IR RA: a burst of energised air (very bright, but only WARM to touch) that shockwaves outwards in EVERY direction, covering where it can go... up (decreases strength) and down (increases strength), snaking through corridors (flats walls or T-junctions halving the power but splitting it in 2 directions, corners simply changing its direction, and dead-ends bouncing it back)... increasing the strength means increased "push", not heat, with level 1 being a breeze and level 6 feeling like a fairly powerful gust... probably enough to will save or knock down small characters.
Spell radius: 10ft per spell level, decreasing its "effective" spell level by 1 every 10ft.
Duration: 5 rounds per "effective" spell level (a square hit with a level 1 spell lasts for 5 rounds, or 30 seconds... and a square hit with a level 2, would last 10 rounds, or a minute)
These are just my opinions, based on what I've read about the D&D mechanics (the air rushing through corridors is my addition, but I think that it honestly fits

) I also think that the idea of FUL being an actual "object" that floats around is a good idea... it might lead to some more interesting convos between Falkor and Ameena (Falkor having a mini-fireball floating around him would
definately make her nervous)