There are many ways to describe a thing. You can point at a burning light bulb and say 'Look, it is bright.' You can describe the movement of light waves, measure the coherence of the rays, or check it with a light-meter. You can even turn the light off, sit in the dark and say 'This is what light is not.' In every case you describe one part, one product or one effect.

Twenty years can expand to fill the imagination or telescope down to a single point. There is a point to everything and it's all in the way you see things - all in the vision. This is what the Tweny/20 Catalogue is all about. We have laid all the light bulbs out side by side and, for each one, described the way the light fell.