In article ,
wrote:
I'd ask why?

There's a particular reason why - the lighting is for a room for use by
disabled people, some of whom have indicated an intolerance of
fluorescent lighting. We're trying to offer an economical alternative.

That is likely caused by flicker. Changing to electronic ballasts sorts
this as they run at a much higher frequency than mains.

You'd also have to be careful if changing to LED - some drivers for these
cause flicker too.

--
*My luck is so bad that if I bought a cemetery, people would stop dying.

Dave Plowman London SW
To e-mail, change noise into sound.