Open the door and place items inside the device chamber. Start a cycle by pushing the start button once for a single cycle (3 minutes for Luma, 1 minute for Luma Pro) and twice for a double cycle. Close the door. The UV-C bulbs will turn on automatically and start the cycle. The LED lights at the bottom of the device will display a red colored bar, when these lights display a full white colored bar and the UV-C lights inside the device have turned off, the cycle is completed. Open the door and remove your items.