CFL side lighting for flower question..

Hello! I'm adding two CFL's as side lighting to my 400w Hortilux Super HPS and was wondering what some good warm bulbs I could get at WalMart or somewhere might be? Should I just go for the highest lumen output and correct spectrum or should I get a specialized grow CFL... Help!

I use 55 watt pl-l tubes from ahsupply.com vertically in corners of the tent. About 21 inches long with reflectors..About 10 inches of good light coming off these for flowering. A cfl will not be long enough to cover much plant, so a tube type is preferred.