Reptile One Fan Heater 20WThe low voltage fan heater is a fan forced heat lamp unit that produces some UVA and UVB light (UVB output approx. 4-5%). This lamp will provide a warm flow of air that will help to create temperature gradients through the environment as well as producing a highly directional beam of light over an intended basking site. The air flow created by the fan creates convection currents within the enclosure giving flow distribution over a large area. Not recommended as a primary source of UVB.