You can either use both or one or the other. It just depends on your needs. There's not one right way to do things. For example, if the room where you're going to keep your BP consistently stays around 75 or higher, you can get away with just using the UTH (don't forget that a UTH NEEDS to be controlled by a thermostat). If you're going to use a lamp, I suggest you get a CHE bulb since they don't produce light and last longer than the black/red bulbs do. Also, I'd suggest getting a digital thermometer/hygrometer so you always know your ambient temp and humidity.