I would suggest setting a hard grade - 4 or 5 even. The Ilford head uses two lamps with green and blue filters, and our StopClock 500 controls these independently to produce a split-grade exposure. It's not possible to get white light from the Ilford head (unless you remove the filters altogether). We haven't actually tried graded papers but given that they are mostly blue-sensitive, setting a hard grade will minimise the use of the green lamp. Maybe PE can offer some more advice given the above product information, although I entirely agree that it's largely pointless to use any filters for graded paper if you have a white-light source. Ron, do you think the green sensitivity is generally sufficient to make it worthwhile using the green lamp as well as the blue?