After thinking more about what you said, were you trying to say that PAR watts should be considered and not lumens? If so, I understand, I just don't agree that lumens have NOTHING to do with plant growth. It is a measurement that is readily available on all lights, and applied to growing, it's an easy system to figure out how much light is enough light.

We were mentioning how halogens were not efficient sources of light so PAR wattage is a valid discussion. However, you could have provided a little more than just "sorry mate".