I think I have those same bulbs in 45w 6500K. The bulb itself is longer and has more surface area than most CFL I see. I like them a lot, and I'm using them for Veg now, and they're doing great.
I honestly wish I found the same bulbs in 45w 2700K for flowering. But now I'm looking for the bulbs you just posted, so thanks
And yes as stated previously, you can use it for flowering