Coralife MH bulb quality

[Noj]

yeah this really makes me wonder...
I have had my tank up and running for just over a year now, and have NEVER had any hair algae or any nusance algae until now. It grows quickly, I use my magfloat on the front of the tank, and I'll NEED to do it again in 3-4 days.

I am more than happy with the setup, and design, but it seems odd that the bulbs provided dont seem to be of the same quality.

Looks like I might swap my 10000k bulb. Any suggestions on which is best? I'm thinking either another 10000k, or 14000k.