No matter how much I rack my brains I cant understand how this works.

Industrial lighting circuit, single NO push button ... press once lights come on, press again lights go off.  I know this is really simple but right now this is driving me up the wall!  Can anyone put me out of my misery?

Brilliant thats exactly what I need.  Thankyou.

The idea is to have two types of lighting in one area, some small 28w D lamps that are 'usually on' to appropriate light levels for walkway ... and upon the push of a button these turn off and flouro's turn on to up the lighting level making it suitable for working and vice versa.  Will cut down electric bill no end!

Thanks again.