Its $6.95 for a 23watt CFL 1450 lumes.
I cant go any higher in watts as the base fixture (BC - Batton Connection) is the only fixture I can buy cheaply as ES type fittings are expensive but support higher watts (26 watt +)

But yes, i have bought 3 of each im just in desperate need of money for fans >< Ive already lost one plant to heat