If you have the room and money, ide ditch the 23 and 42 watt cfl's ( low lumen output and you'll use around 8-12 of em) You should go with the 105 watt cfl's, they fit in a normal ballast and give off 6,900 lumens compared to the 1,600 that 23 watt bulbs give off so it would be four 23 watt bulbs in one or you can grab a 200 watt cfl which also fits in a regular fixture and gives off 10,000 lumens ( almost 6 cfls in one ). These will cut back on all of your wireing and just 4 of either bulb in 2 Y fixture would amont in a mass lumen output. Only thing about em is that there big ( like 13" ) but worth it.
PRICES:
I bought my lights on ebay (105 watt) 4 for $110 shipping included.
The 200 watts are pricy but well worth it at around $80 per bulb on ebay.