"Adrian C" wrote in message
...
Martin Angove wrote:

Have you ever *seen* the light from a discharge lamp? Ignoring the
problem of UV exposure (they produce gallons of the stuff) they have to
be the brightest source I've seen, Watt for Watt.

Hwyl!

M.

Just thinking. Do white LED's yet come anywhere close (even in an array?)

Discharge lamps are about five times brighter than the equivalent
fluorescent tube.
Just imagine 200W of tubes in a 1" cube.