You are talking about 1000-watts of HID lighting in an area roughly 3 by 4 and you think a handful of CFLs will make an appreciable difference?
Unless you are talking about several of the large actual grow light CFLs, like 200-watts each or higher, preferably higher, the difference a handful of the home lighting CFLs that many people use for grow lights added to a 1000-watt HID in that size space would be about as much as a 3-year old boy would alter the level of Lake Superior by peeing in it.
If it was felt a mixed light spectrum would be needed different bulbs could be used at different times. For early-mid veg a straight MH, 6500K, for later veg and early flower one of the dual arc bulbs which would give off 600-watts of HPS and 400-watts of MH both at the same time from the same bulb, the single bulb in the 1000-watt system. Too finish flower, straight HPS.
If I felt the lighting of a 1000-watt system needed tweaking in that size of an area that is what I would do, instead of adding a handful of birthday cake candles to a light that puts out a great deal of light on its own.
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