You're both absolutely right.

I forgot to mention I'm using Cree powerled's, that are driven by a supertex led driver. This driver uses a sense resistor to measure the current, if we influence the current ( by adding a resistor parallel to the sense resistor), we can influence the intensity of the powerled's.

Darrel, i'm going to try the erase macro immediately, will post my findings ....

Thanks Experts !