context: The long tube UVB bulbs are best , like Zoomed 's Repsitun model : http : //lllreptile.com/store/catalog/reptile-supplies/uvb-fluorescent-lights-mercury-vapor-bulbs/-/zoo-med-24-repti-sun-100-fluorescent-bulb/ Remember to replace UVB bulbs according to the manufacturer s recommendation after which time the bulb will no longer produce UVB even if visible light still is .
hypothesis: The according happened