I take my pics with a mini tripod, set onto a trash can or bench. I set to camera to ISO1600, Program AE (P) mode, no flash. In that mode the camera itself determines exposure, and the exposure for the Osborne lights is usually 1/2sec to 2sec.
It is vitally important that the camera be absolutely still during these long exposures, which is impossible for the human hand, so that's why I have a pocket-size tripod. You can get one at
Best Buy, Circuit City, or a camera store for $10-$12 and it litterally fits in your pocket.