ive got a plant under one 23W cfl bulb it its very slow
Move the bulb closer? Are you using the correct spectrum?
I've vegged under MH, CFL, T5, and HPS and CFLs/T5s always work the best. Healthier plants that grow much quicker than all of the other methods.
Super ghetto CFL rigs even work well:
Super ugly and less than ideal CFL setup but still vegges better than a 400w MH and this is only 270w of CFL
Same plants 1 week after pic #3 - i just tied them down so they look a bit funny but obviously a bit of growth.
Say you veg at 20/4 for 8 weeks.
400w MH:
20*.4*8*7 = 448 kWh @ $0.12 = $53.76
CFLs (23w each):
First week @ 1 cfl: 20*.023*7 = 3.22
2nd week @ 2 cfl: 20*.046*7 = 6.44
3rd-4th week @ 4 cfl: 20*.092*14 = 25.76
5-8th @ 8 cfl: 20*0.184*28 = 103.04
Total kWh = 138.46 @ $0.12 = $16.62
So with the MH you spend $54 on veg and with the CFLs you spend $17. That's a savings of 317%