See Attached Excel for our emulsions and our units. The tabs at the bottom will tell you which unit the times are for. If you have our emulsion and a different type of unit, you will need to do the step wedge test to determine your times. Although these figures may serve as a ball park, several factors such as distance of bulbs from the glass, number of bulbs, the watts of each bulb, the age of the bulbs, etc will affect the time that is required to expose any emulsion. The same goes if you have our exposure unit but purchase a different brand of emulsion.