In addition to working with more light add a Fresnel or brighter ground glass. I added a Boss screen to a Linhof Technikardan 45. Unless you are using strobe lights or lots of ventilation, only adding more light can make the project very warm. Good ventilation to dissipate heat may cause subject movement if the subject is not heavy. If the subject is heat sensitive you can easily melt your project or make it turn brown, black or dead. I have experienced all of the above.