it seems, on reading back through the thread, that i am in the right place. i am running all 90 C NM cable through my attic. it is a home run straight to the box. the fixtures are non ic with electronic dimmable ballasts rated at .25 amp (26w). fixture sez : maximum 8 12awg branch wires. i am daisy chaining them so the jb has 14/2 in and out ( to next fixture ) plus the 18 gauge they wired the ballast to the fixture ( 3 wires in to ballast, 4 wires out to socket ).more info for the thread.
scott
ps i got the fixtures after lots of painful back and forth at my local electrical supply house ( not home depot ). these new electronic dimmable ballasts aren't something everyone knows about. the trouble was matching the dimmer to the ballasts. conflicting opinions as to what would control which ballasts, etc. i've just hooked one up so far for a test. it dimmed beautifully and no noise or flicker. but the temperature thing i'm still pondering.