Lighting, Light Fixtures, Ceiling and Exhaust Fans - So I made a mistake , now what?

I have a barn with no electricity. Last year I dug the trench, laid the cable, and started buying all the fixtures to install this coming summer for hook up!
However, I did not know at the time that florescent lights came in models for different temperatures. I bought 6 double tube light fixtures that I can't take back. They are rated for replacement in warm areas and not freezing area, which the barn would be at times.
Question: Is this a simple thing to correct electronically or should I just "bite" the bullet and buy new fixtures.
They aren't installed yet.
Changeling

I'd just try it. Install the fixtures you have. If they don't work well enough for you, then you can always try to remedy it later. But you might find that they work perfectly.