Do I switch bulbs

I am helping a friend with his little grow and want to know if it is a good idea to switch the blue lights with more yellow now that we are into flowering. We currently have 3 female babies that are just popin. Our lighting consists of 2 48" plant florescent bulbs, 2 48" daylightbulbs, and 2 300w cfl 2100k blulbs.
 
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