... very difficult to handle back plus the expense. As LED is semiconductor illuminant, its safe to body and its ... once people touch it, easy to get scald. But LED UV lamp is cold illuminant, when it works doesnt ... its troublesome, of course increase the cost. But our LED UV lamp can be used over 35000 hours. So, ... such things it is easy to damage it. But LED UV is solid material so can avoid such things ...