daylight bulbs

I used to use them all the time when I worked in photo printing. It was the best constant light to grade prints (i.e. check their colour balance was correct. The idea is that the light should give off the same colour as pure daylight, so many degrees Kelvin (I've forgotten all that now).

My mum also used to has a daylight bulb in an overhead lamp for reading, when her eyesight started to deteriorate, she needed a good strong, clear crisp light.....my dad sat in the room with sunglasses :-)

Ron

KFC etc use special blue lamps in the toilets to stop drug users finding their veins.

Adam

I have wondered why some toilets have those blue lights, local Morrisons store toilet has them.

Mike

That is what they are. The downside is they're going to be low efficiency.

In article , ARWadsworth writes

They have them in Glasgow Sheriff court too. I was insulted as I thought the area was reserved for jurors but it turns out it was available to the Sheriff and security guards too so there may have been a real need for the druggie lighting after all.

That said I don't think it counts truly as 'daylight' lighting.

Blues lights ... stops you finding the druggies ... has anyone told the police that's the reason they can never find them because they have their blue lights on?