Best balls for poor light

Played twilight the other evening and it will be a regular occurance.  Needed a flashlight by the end and hard to see drives once they left the tee by the end.

Are yellow balls better in failing light or maybe some of the fancy flourescent colours?

Any good experiences?

These could do the trick.....

http://www.best4balls.com/product_info.php?cPath=29_43&products_id=75

Not sure these would be up to the ProV1 standard!

I agree with Wayne on the white balls thing - it just doesn't seem right to use anything other than white!