This is a budget grow, so lets do a tally of costs so far

2x 2pack 23w 1600lumen CFLs: $8.12 *2 = $16.24

Light socket 4x $2.66 = $10.64
Socket Splitter 4x $2.06 = $8.24
15' extension chord = $2.92
4 23w 1600 lumen CFLs = $11.98
+tax: 3.12

So far, I've spent $53.14
Not too bad.