Using the Talis - us 10.0 UVB Reptile Light Fixture is a breeze. First, find a suitable spot in your reptile's terrarium. Make sure it's at a proper distance from where your reptile spends most of its time. Usually, you want the light to cover a good part of the terrarium so your reptile can easily get under it. As for the time, keep the light on for about 10 - 12 hours a day, just like a normal day - night cycle. When it comes to maintenance, clean the fixture regularly with a soft, dry cloth to keep it free of dust and debris. Also, don't forget to replace the bulb every 6 - 12 months. This ensures that your reptile always gets the right amount of UVB. And one important note: never touch the bulb with bare hands as the oils from your skin can damage it. That's all you need to know to keep your reptile happy and healthy with this great light fixture.