We purchased the 100W lamp to use for traveling. We like that it can be set for 15 minutes and up to 60 minutes, as needed; we like that it does not produce ozone so the room/space can be entered immediately upon completion of the cycle and the space does not need to be ventilated. HUGE plus for traveling.
We also purchased the smaller unit which is a little larger than a glade plug-in air freshner. These little guys can run 24/7 and can be placed anywhere and there is no need to leave the room/space when running.
Love this company, love the products they offer and they are very customer service oriented.