Exo Terra Repti-Glo 5.0 Fluorescent Lamp, 40W, 48 inches T8 lamp; Ideal for all tropical and sub-tropical reptiles Provides necessary UVB rays for optimal calcium metabolism Stimulates appetite, activity and reproductive behavior through UVA radiation High UVB output. Effective up to 12 inches 40 Watts, 48 inches length; Recommended in combination with Repti Glo 5.0 or Repti Glo 10.0