PC fans from mains (with AC-DC psu)

[qbazdz]

I have a small project on the go, where Id like to get a few fans up and running with PWM controller and powered from mains.
It does need to be pretty efficient to make sense and it will be used for several hours in a day so a phone charger is out of the question.
Anyone has had similar needs and can recommend some kit?

Thanks!

 

[qbazdz]

I was thinking regular 12V PC fans.
The AC infinity stuff looks great, shame in black only.
Do you know if they are bespoke designed for 5V operation?

I forgot to add, that I have an extension lead with USB C available so was hoping I can just get away with powering this up through a C cable, just don't know how to force 12V output into the PWM regulator (these are pretty dumb, they just work of whatever voltage is supplied).