help with lights

I jus bought a t8 2' 2 bulb fixture and the only bulb I could find was 4100k 18w bulbs... is this ok for flowering?? My plants have been flowering for 2 weeks now under 7 23 watt cfls... I took out 3 cfls n replaced it with the t8 fixture.. is that ok??

the cfls will do a better job IMO

yea agree .. skip that t8 tifxutre .. get T5HO and in 2700K for flowering .. 6500/5000K for veg. tho I would mix em a bit ..