These tubes are predominantly used for insect traps and fly killers (insectocutor units), however they are used in other applications including industrial processes and special effects. Blacklight lamps differ from standard fluorescent lamps only in the composition of the phosphur which radiates most of its energy in the near ultraviolet region, peaking at about 350 nanometers.
Last Wednesday evening I placed my order with BLT. As usual I had found just what I wanted and at a reasonable price. The I found that I had inadvertently duplicated ( and paid for) my order. At 9pm I left an email for customer services. At 0902 next morning I had a reply assuring me all had been sorted out. Two days later my order arrived exactly as required. You can't get better servie than this. Thank you BLT.