Should I process Light Works Lightening Cream with heat? June 11, 2020 05:52 Updated No, heat processing is not recommended. Light Works Lightening Cream was formulated to process at room temperature. Related articles How often can I use Light Works? What is the difference between Color Reviving Gloss and Light Works Finish Toning Glaze? Who should not use Light Works? How long will Light Works last? Can I use Color Reviving Gloss over blonde highlights?