On Thu, 30 Apr 2015 23:06:35 +0100, EricP
wrote:

We are LED converted at home and very pleased with them but the place
my wife works have just replaced all their bulbs with Daylight LEDs

Immediately everyone working there has got terrible headaches that
last about twenty four hours. The whole staff from managers down.

Anyone get any ideas about this.

(No dimmers are involved only on/off switches.)

Also found this:

http://www.digikey.co.uk/en/articles...g-applications

- Mike