I have not tried flowering with cfls myself seen some nice pics, ill give it a go one day
i have been using them recently over the last couple of years
for mothers, i think they could produce some good bud, but the footprint is tiny, once you get them like 2 inch from the plant (125w)
you can see they are putting out very good light at that distance but only for about 6-8 inch of penetration
with a footprint of 1 to 1.5 sqft
i would only attempt to grow tiny little plants with them, or a very well controlled screen of green
if you can keep the colas short like 8 inch max i think they would do well, would be so tedious though lifting the lights up every day as they grow
peace