It is possible to also run different contests encouraging different equipment types to be shut down when not in use (drying ovens, biosafety cabinets, floor centrifuges, and other plug loads). Some equipment like heat blocks, water baths, and drying ovens can be placed on timers (choose timers with the appropriate electrical capacity for the equipment) and other equipment can simply be turned off between uses, like biosafety cabinets and floor centrifuges (keep centrifuge lids propped when not in use and rotors pre-cooled in a nearby cold room or refrigerator). Contest cards like the following can be used when running a contest encouraging equipment to be turned off.