(Christopher) wrote in message ...
In several experiments conducted by NASA and by the Russians plants
were grown indoors using an artificial light. What type of light was
used that produces light on the same wave lengths as the suns does?

Are you sure the lights produced the same wave length as the sun?

On TV documentaries, various forms of fluorescent lights seem to be
the popular light sources for hydroponics experiments. AFAIK, those
tend to be UV-heavy and a bit 'bluish' compared to natural sunlight.