86w additional cfl lighting

soooo Im growing under 450/600w hid (dimmable) and Im thinkin of using 2 43w cfls as additional lighting on the sides of the plants. (ill be moving the cfl lights every 2-3 days to a new area of the grow). I have 7 plants vegging under 450w right now, and plan on sticking 4-10 more in with them (these will get 1-2 weeks veg if lucky then be flipped)
My q is will this additional lighting significantly impact my yield?
If it will add 1/2oz+ Ill gladly use the cfls. however if it wont do much but waste another 86w, then Ill just use them for my starting plants.

no not two 42 cfl you need like 4 around each plant if you want, maybe not that much but it would be a waste of money and create excess heat. just go get a t5 and put that in there.