In , default wrote in part:

Compact fluorescent's are pretty good, but they are not "broad
spectrum." Use a compact disc as a diffraction grating and look at
the spectrum from the lamps versus incandescent lamps and sunlight if
you don't believe it.

I have serious doubts of need of "broad spectrum". I surely consider
"good enough" high color rendering index as well as stimulating all known
and suspected photoreceptors in human eyes in ratio roughly similar to
that of the "desired broad spectrum light sources", and that is easily
enough achieved with a spiky spectrum. Color and appearance of the light
and rated color rendering index are good indicators of these issues.

- Don Klipstein )