Overdriving lights.

[Gordoe]

Would it not be the chemical composition of a lamp that makes up its spectrum?

The difference between a new lamps spectrum, and and old lamp is dramatic. We see this with the growth of algae when a lamp gets too old. The power does increase over the life of the lamp, but it's an increase in current. The variable is the lamp, more specifically what the electrical charge has done to the gases in the tube.

I don't forsee any change in the spectrum, only a change in amplitude.

just my humble theory,
Gord [img]images/smiles/icon_smile.gif[/img]