The fluorescent UVB bulb was 24 inches long and had a wattage of 10%. He installed the fixture at one end of the terrarium, about 8 - 10 inches above the basking rock where Spike liked to lounge. The timer was set to provide 12 hours of light and 12 hours of darkness, mimicking a natural day - night cycle.
Within a few weeks, Spike's energy levels returned to normal, and his appetite improved. This shows how important it is to monitor the UVB light and replace the bulb in a timely manner to keep the reptile healthy.