New bulb = Noisier Ballast?

[OCDP]

Maybe it's just me, who knows. I just put in a new Geismann 13k into my floodlamp fixture, and it seems as if my ballast is making more noise than usual? I can't even describe the sound.... like a buzzing sound, high pitched.

It's not too bad, just wondering if new bulbs = a noisier ballast?

Thanks.

PS: The Geismann looks OK over the tank. There is a slight yellow hue, but I am not using any actinics. So once this bad boy is in the AqualightPro I think it will look great. Been using 20k Ushio so it's a fairly big step down. The corals do not have nearly as much colour in them with this light... so it's a waiting game to get the aqualight pro up and running.