On Friday, May 1, 2015 at 10:22:07 AM UTC+1, stuart noble wrote:
On 01/05/2015 09:28, fred wrote:
In article , EricP
writes
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.)

She'll need to wear sunglasses until the management realise their
mistake. Seriously, they'll get the message eventually and the sunnies
will help reduce the effects in the mean time. Don't vocalise too loudly
about the problem but if asked, do mention that the glasses are needed
to stave off blinding headaches that started when the new lamps were
installed.


You can get sheets of daylightwarm white converting filters quite
cheaply. Might be worth a try, if only as an experiment

Its a yellow filter , it`ll just lower output by quite a lot.

Warm white LEDs use a differnt phosphor mix to cool white.