OUTFOX recommends trying this Classic Gel Glo Germ Kit and then upgrading with more fluorescent powder or fluorescent gel if necessary. This Glo Germ Kit will take care of most of the hygiene lessons, infection control activities, environmental cleaning and other trainings you will want to do with your health staff, class or group. In addition to a recommended back-up black light and batteries, you will want make sure to have enough fluorescent powder or gel. Do you share your kit with other instructors? It is unwise to just assume that the instructor before you will leave enough left for your training. Most people that borrow do not take the time and money to refill once they are done. In this case, you should look into buying additional separate pieces (or multiple kits).